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1021001222220 = 2235747109747149
BaseRepresentation
bin11101101101110000110…
…10100100100001001100
310121121101022221001102020
432312320122210201030
5113212002303102340
62101012543330140
7133523235124110
oct16667032444114
93547338831366
101021001222220
11364005632aa1
12145a632b0950
137538421aa55
14375b96b7740
151b85a3559d0
hexedb86a484c

1021001222220 has 192 divisors, whose sum is σ = 3339831398400. Its totient is φ = 228193302528.

The previous prime is 1021001222107. The next prime is 1021001222221. The reversal of 1021001222220 is 222221001201.

It is a super-3 number, since 3×10210012222203 (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1021001222220.

It is not an unprimeable number, because it can be changed into a prime (1021001222221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21631206 + ... + 21678354.

It is an arithmetic number, because the mean of its divisors is an integer number (17394955200).

Almost surely, 21021001222220 is an apocalyptic number.

1021001222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021001222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1669915699200).

1021001222220 is an abundant number, since it is smaller than the sum of its proper divisors (2318830176180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021001222220 is a wasteful number, since it uses less digits than its factorization.

1021001222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48312 (or 48310 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1021001222220 its reverse (222221001201), we get a palindrome (1243222223421).

The spelling of 1021001222220 in words is "one trillion, twenty-one billion, one million, two hundred twenty-two thousand, two hundred twenty".