31102213212120 has 64 divisors (see below), whose sum is σ = 93477218699520. Its totient is φ = 8278760939904.

The previous prime is 31102213211989. The next prime is 31102213212173. The reversal of 31102213212120 is 2121231220113.

It is a super-2 number, since 2×31102213212120² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236849452 + ... + 236980731.

It is an arithmetic number, because the mean of its divisors is an integer number (1460581542180).

Almost surely, 2^{31102213212120} is an apocalyptic number.

31102213212120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31102213212120 is an abundant number, since it is smaller than the sum of its proper divisors (62375005487400).

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

31102213212120 is a wasteful number, since it uses less digits than its factorization.

31102213212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473830744 (or 473830740 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 31102213212120 its reverse (2121231220113), we get a palindrome (33223444432233).

The spelling of 31102213212120 in words is "thirty-one trillion, one hundred two billion, two hundred thirteen million, two hundred twelve thousand, one hundred twenty".