31210012421 has 12 divisors (see below), whose sum is σ = 36327398688. Its totient is φ = 26735321592.

The previous prime is 31210012417. The next prime is 31210012451. The reversal of 31210012421 is 12421001213.

It is not a de Polignac number, because 31210012421 - 2² = 31210012417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31210012421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31210012451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109361 + ... + 272726.

It is an arithmetic number, because the mean of its divisors is an integer number (3027283224).

Almost surely, 2^31210012421 is an apocalyptic number.

It is an amenable number.

31210012421 is a deficient number, since it is larger than the sum of its proper divisors (5117386267).

31210012421 is a wasteful number, since it uses less digits than its factorization.

31210012421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383768 (or 383761 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 31210012421 its reverse (12421001213), we get a palindrome (43631013634).

The spelling of 31210012421 in words is "thirty-one billion, two hundred ten million, twelve thousand, four hundred twenty-one".