31323131103012 has 48 divisors (see below), whose sum is σ = 83592258355200. Its totient is φ = 8942618663712.

The previous prime is 31323131103007. The next prime is 31323131103067. The reversal of 31323131103012 is 21030113132313.

31323131103012 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×31323131103012² (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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142543012 + ... + 142762587.

It is an arithmetic number, because the mean of its divisors is an integer number (1741505382400).

Almost surely, 2^{31323131103012} is an apocalyptic number.

It is an amenable number.

31323131103012 is an abundant number, since it is smaller than the sum of its proper divisors (52269127252188).

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

31323131103012 is a wasteful number, since it uses less digits than its factorization.

31323131103012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285306920 (or 285306918 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31323131103012 its reverse (21030113132313), we get a palindrome (52353244235325).

The spelling of 31323131103012 in words is "thirty-one trillion, three hundred twenty-three billion, one hundred thirty-one million, one hundred three thousand, twelve".