321220113102 has 64 divisors (see below), whose sum is σ = 851266575360. Its totient is φ = 87786860832.

The previous prime is 321220113089. The next prime is 321220113113. The reversal of 321220113102 is 201311022123.

321220113102 is a `hidden beast` number, since 321 + 2 + 20 + 11 + 310 + 2 = 666.

It is a super-2 number, since 2×321220113102² (a number of 24 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18464973 + ... + 18482360.

It is an arithmetic number, because the mean of its divisors is an integer number (13301040240).

Almost surely, 2^321220113102 is an apocalyptic number.

321220113102 is an abundant number, since it is smaller than the sum of its proper divisors (530046462258).

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

321220113102 is a wasteful number, since it uses less digits than its factorization.

321220113102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36947374 (or 36947368 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 321220113102 its reverse (201311022123), we get a palindrome (522531135225).

The spelling of 321220113102 in words is "three hundred twenty-one billion, two hundred twenty million, one hundred thirteen thousand, one hundred two".