31371378012 has 36 divisors (see below), whose sum is σ = 85399863640. Its totient is φ = 9652731552.

The previous prime is 31371377971. The next prime is 31371378019. The reversal of 31371378012 is 21087317313.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31371378019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33515962 + ... + 33516897.

Almost surely, 2^31371378012 is an apocalyptic number.

It is an amenable number.

31371378012 is an abundant number, since it is smaller than the sum of its proper divisors (54028485628).

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

31371378012 is a wasteful number, since it uses less digits than its factorization.

31371378012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67032882 (or 67032877 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The spelling of 31371378012 in words is "thirty-one billion, three hundred seventy-one million, three hundred seventy-eight thousand, twelve".