31210113012 has 24 divisors (see below), whose sum is σ = 78425412576. Its totient is φ = 9603111648.

The previous prime is 31210112977. The next prime is 31210113019. The reversal of 31210113012 is 21031101213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31210112982 and 31210113000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31210113019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100032258 + ... + 100032569.

It is an arithmetic number, because the mean of its divisors is an integer number (3267725524).

Almost surely, 2^31210113012 is an apocalyptic number.

It is an amenable number.

31210113012 is an abundant number, since it is smaller than the sum of its proper divisors (47215299564).

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

31210113012 is a wasteful number, since it uses less digits than its factorization.

31210113012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200064847 (or 200064845 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31210113012 its reverse (21031101213), we get a palindrome (52241214225).

The spelling of 31210113012 in words is "thirty-one billion, two hundred ten million, one hundred thirteen thousand, twelve".