31022221012 has 6 divisors (see below), whose sum is σ = 54288886778. Its totient is φ = 15511110504.

The previous prime is 31022221007. The next prime is 31022221031. The reversal of 31022221012 is 21012222013.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23557952196 + 7464268816 = 153486^2 + 86396^2 .

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, 3877777623 + ... + 3877777630.

Almost surely, 2^31022221012 is an apocalyptic number.

It is an amenable number.

31022221012 is a deficient number, since it is larger than the sum of its proper divisors (23266665766).

31022221012 is a wasteful number, since it uses less digits than its factorization.

31022221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7755555257 (or 7755555255 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31022221012 its reverse (21012222013), we get a palindrome (52034443025).

The spelling of 31022221012 in words is "thirty-one billion, twenty-two million, two hundred twenty-one thousand, twelve".