31021010212 has 12 divisors (see below), whose sum is σ = 57143966320. Its totient is φ = 14694162696.

The previous prime is 31021010201. The next prime is 31021010233. The reversal of 31021010212 is 21201012013.

It is a junction number, because it is equal to n+sod(n) for n = 31021010192 and 31021010201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204085518 + ... + 204085669.

Almost surely, 2^31021010212 is an apocalyptic number.

It is an amenable number.

31021010212 is a deficient number, since it is larger than the sum of its proper divisors (26122956108).

31021010212 is a wasteful number, since it uses less digits than its factorization.

31021010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408171210 (or 408171208 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31021010212 its reverse (21201012013), we get a palindrome (52222022225).

The spelling of 31021010212 in words is "thirty-one billion, twenty-one million, ten thousand, two hundred twelve".