31312331121000 has 128 divisors (see below), whose sum is σ = 99966438000000. Its totient is φ = 8155769932800.

The previous prime is 31312331120989. The next prime is 31312331121017. The reversal of 31312331121000 is 12113321313.

It is a happy number.

It is a super-2 number, since 2×31312331121000² (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, 121236625 + ... + 121494624.

It is an arithmetic number, because the mean of its divisors is an integer number (780987796875).

Almost surely, 2^{31312331121000} is an apocalyptic number.

31312331121000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31312331121000 is an abundant number, since it is smaller than the sum of its proper divisors (68654106879000).

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

31312331121000 is a wasteful number, since it uses less digits than its factorization.

31312331121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242731316 (or 242731302 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31312331121000 its reverse (12113321313), we get a palindrome (31324444442313).

The spelling of 31312331121000 in words is "thirty-one trillion, three hundred twelve billion, three hundred thirty-one million, one hundred twenty-one thousand".