1002102201220 has 24 divisors (see below), whose sum is σ = 2113146643608. Its totient is φ = 399177638400.

The previous prime is 1002102201209. The next prime is 1002102201227. The reversal of 1002102201220 is 221022012001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4568678464 + 997533522756 = 67592^2 + 998766^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1002102201220.

It is not an unprimeable number, because it can be changed into a prime (1002102201227) 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 7 ways as a sum of consecutive naturals, for example, 103947691 + ... + 103957330.

It is an arithmetic number, because the mean of its divisors is an integer number (88047776817).

Almost surely, 2^{1002102201220} is an apocalyptic number.

1002102201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002102201220 is an abundant number, since it is smaller than the sum of its proper divisors (1111044442388).

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

1002102201220 is a wasteful number, since it uses less digits than its factorization.

1002102201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207905271 (or 207905269 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1002102201220 its reverse (221022012001), we get a palindrome (1223124213221).

The spelling of 1002102201220 in words is "one trillion, two billion, one hundred two million, two hundred one thousand, two hundred twenty".