31103110221102 has 32 divisors (see below), whose sum is σ = 69154612682400. Its totient is φ = 10362214911744.

The previous prime is 31103110221067. The next prime is 31103110221151. The reversal of 31103110221102 is 20112201130113.

31103110221102 is a `hidden beast` number, since 31 + 1 + 0 + 311 + 0 + 221 + 102 = 666.

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 15 ways as a sum of consecutive naturals, for example, 152355253 + ... + 152559264.

It is an arithmetic number, because the mean of its divisors is an integer number (2161081646325).

Almost surely, 2^{31103110221102} is an apocalyptic number.

31103110221102 is an abundant number, since it is smaller than the sum of its proper divisors (38051502461298).

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

31103110221102 is a wasteful number, since it uses less digits than its factorization.

31103110221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304916417 (or 304916411 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 31103110221102 its reverse (20112201130113), we get a palindrome (51215311351215).

The spelling of 31103110221102 in words is "thirty-one trillion, one hundred three billion, one hundred ten million, two hundred twenty-one thousand, one hundred two".