31221410412 has 12 divisors (see below), whose sum is σ = 72849957656. Its totient is φ = 10407136800.

The previous prime is 31221410327. The next prime is 31221410447. The reversal of 31221410412 is 21401412213.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×31221410412² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300892089 + ... + 1300892112.

Almost surely, 2^31221410412 is an apocalyptic number.

It is an amenable number.

31221410412 is an abundant number, since it is smaller than the sum of its proper divisors (41628547244).

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

31221410412 is a wasteful number, since it uses less digits than its factorization.

31221410412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2601784208 (or 2601784206 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 31221410412 its reverse (21401412213), we get a palindrome (52622822625).

The spelling of 31221410412 in words is "thirty-one billion, two hundred twenty-one million, four hundred ten thousand, four hundred twelve".