31312123011240 has 64 divisors (see below), whose sum is σ = 94198030358400. Its totient is φ = 8326640685312.

The previous prime is 31312123011217. The next prime is 31312123011251. The reversal of 31312123011240 is 4211032121313.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 31312123011240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 363375247 + ... + 363461406.

It is an arithmetic number, because the mean of its divisors is an integer number (1471844224350).

Almost surely, 2^{31312123011240} is an apocalyptic number.

31312123011240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31312123011240 is an abundant number, since it is smaller than the sum of its proper divisors (62885907347160).

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

31312123011240 is a wasteful number, since it uses less digits than its factorization.

31312123011240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726837026 (or 726837022 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 31312123011240 its reverse (4211032121313), we get a palindrome (35523155132553).

The spelling of 31312123011240 in words is "thirty-one trillion, three hundred twelve billion, one hundred twenty-three million, eleven thousand, two hundred forty".