31312323121000 has 128 divisors (see below), whose sum is σ = 73757523490560. Its totient is φ = 12442010208000.

The previous prime is 31312323120989. The next prime is 31312323121019. The reversal of 31312323121000 is 12132321313.

It is a super-2 number, since 2×31312323121000² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90951187 + ... + 91294813.

It is an arithmetic number, because the mean of its divisors is an integer number (576230652270).

Almost surely, 2^{31312323121000} 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 31312323121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36878761745280).

31312323121000 is an abundant number, since it is smaller than the sum of its proper divisors (42445200369560).

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

31312323121000 is a wasteful number, since it uses less digits than its factorization.

31312323121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344252 (or 344238 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31312323121000 its reverse (12132321313), we get a palindrome (31324455442313).

The spelling of 31312323121000 in words is "thirty-one trillion, three hundred twelve billion, three hundred twenty-three million, one hundred twenty-one thousand".