31312401012 has 60 divisors (see below), whose sum is σ = 84497370496. Its totient is φ = 10100771280.

The previous prime is 31312401011. The next prime is 31312401013. The reversal of 31312401012 is 21010421313.

It is an interprime number because it is at equal distance from previous prime (31312401011) and next prime (31312401013).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312401011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1548718 + ... + 1568805.

Almost surely, 2^31312401012 is an apocalyptic number.

It is an amenable number.

31312401012 is an abundant number, since it is smaller than the sum of its proper divisors (53184969484).

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

31312401012 is a wasteful number, since it uses less digits than its factorization.

31312401012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3117570 (or 3117559 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31312401012 its reverse (21010421313), we get a palindrome (52322822325).

The spelling of 31312401012 in words is "thirty-one billion, three hundred twelve million, four hundred one thousand, twelve".