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1031122202220 = 22325114723474721
BaseRepresentation
bin11110000000100111010…
…11000010111001101100
310122120111200100002220100
433000103223002321230
5113343214240432340
62105405131151100
7134332112051325
oct17002353027154
93576450302810
101031122202220
11368329669080
12147a088a5490
1376307cb6206
1437c9992d44c
151bc4db5e830
hexf013ac2e6c

1031122202220 has 288 divisors, whose sum is σ = 3486897662976. Its totient is φ = 244494489600.

The previous prime is 1031122202189. The next prime is 1031122202237. The reversal of 1031122202220 is 222022211301.

It is a super-2 number, since 2×10311222022202 (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1031122202193 and 1031122202202.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 218409460 + ... + 218414180.

It is an arithmetic number, because the mean of its divisors is an integer number (12107283552).

Almost surely, 21031122202220 is an apocalyptic number.

1031122202220 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 1031122202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1743448831488).

1031122202220 is an abundant number, since it is smaller than the sum of its proper divisors (2455775460756).

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

1031122202220 is a wasteful number, since it uses less digits than its factorization.

1031122202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7141 (or 7136 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1031122202220 its reverse (222022211301), we get a palindrome (1253144413521).

The spelling of 1031122202220 in words is "one trillion, thirty-one billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty".