31231123323012 has 144 divisors (see below), whose sum is σ = 80999030112000. Its totient is φ = 10141654533120.

The previous prime is 31231123322941. The next prime is 31231123323017. The reversal of 31231123323012 is 21032332113213.

31231123323012 is a `hidden beast` number, since 3 + 1 + 2 + 311 + 2 + 332 + 3 + 0 + 12 = 666.

It is not an unprimeable number, because it can be changed into a prime (31231123323017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 888517614 + ... + 888552762.

Almost surely, 2^{31231123323012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31231123323012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40499515056000).

31231123323012 is an abundant number, since it is smaller than the sum of its proper divisors (49767906788988).

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

31231123323012 is a wasteful number, since it uses less digits than its factorization.

31231123323012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37626 (or 37621 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 31231123323012 its reverse (21032332113213), we get a palindrome (52263455436225).

The spelling of 31231123323012 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty-three million, three hundred twenty-three thousand, twelve".