31120220332012 has 36 divisors (see below), whose sum is σ = 63352519675200. Its totient is φ = 13337102007264.

The previous prime is 31120220331979. The next prime is 31120220332049. The reversal of 31120220332012 is 21023302202113.

It is a super-2 number, since 2×31120220332012² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19926114 + ... + 21431062.

It is an arithmetic number, because the mean of its divisors is an integer number (1759792213200).

Almost surely, 2^{31120220332012} is an apocalyptic number.

It is an amenable number.

31120220332012 is an abundant number, since it is smaller than the sum of its proper divisors (32232299343188).

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

31120220332012 is a wasteful number, since it uses less digits than its factorization.

31120220332012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610470 (or 1610461 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31120220332012 its reverse (21023302202113), we get a palindrome (52143522534125).

The spelling of 31120220332012 in words is "thirty-one trillion, one hundred twenty billion, two hundred twenty million, three hundred thirty-two thousand, twelve".