31311031012000 has 48 divisors (see below), whose sum is σ = 76931203206312. Its totient is φ = 12524412403200.

The previous prime is 31311031011991. The next prime is 31311031012049. The reversal of 31311031012000 is 21013011313.

It can be written as a sum of positive squares in 4 ways, for example, as 11576788491024 + 19734242520976 = 3402468^2 + 4442324^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3913874877 + ... + 3913882876.

Almost surely, 2^{31311031012000} is an apocalyptic number.

It is an amenable number.

31311031012000 is an abundant number, since it is smaller than the sum of its proper divisors (45620172194312).

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

31311031012000 is an equidigital number, since it uses as much as digits as its factorization.

31311031012000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7827757778 (or 7827757760 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31311031012000 its reverse (21013011313), we get a palindrome (31332044023313).

The spelling of 31311031012000 in words is "thirty-one trillion, three hundred eleven billion, thirty-one million, twelve thousand".