31313000021012 has 6 divisors (see below), whose sum is σ = 54797750036778. Its totient is φ = 15656500010504.

The previous prime is 31313000020997. The next prime is 31313000021021. The reversal of 31313000021012 is 21012000031313.

It can be written as a sum of positive squares in only one way, i.e., 20929563613456 + 10383436407556 = 4574884^2 + 3222334^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3914125002623 + ... + 3914125002630.

It is an arithmetic number, because the mean of its divisors is an integer number (9132958339463).

Almost surely, 2^{31313000021012} is an apocalyptic number.

It is an amenable number.

31313000021012 is a deficient number, since it is larger than the sum of its proper divisors (23484750015766).

31313000021012 is a wasteful number, since it uses less digits than its factorization.

31313000021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7828250005257 (or 7828250005255 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31313000021012 its reverse (21012000031313), we get a palindrome (52325000052325).

The spelling of 31313000021012 in words is "thirty-one trillion, three hundred thirteen billion, twenty-one thousand, twelve".