31121214424 has 16 divisors (see below), whose sum is σ = 61784764200. Its totient is φ = 14645277312.

The previous prime is 31121214409. The next prime is 31121214473. The reversal of 31121214424 is 42441212113.

It is a congruent number.

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, 114416094 + ... + 114416365.

Almost surely, 2^31121214424 is an apocalyptic number.

31121214424 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31121214424 is a deficient number, since it is larger than the sum of its proper divisors (30663549776).

31121214424 is a wasteful number, since it uses less digits than its factorization.

31121214424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228832482 (or 228832478 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

Adding to 31121214424 its reverse (42441212113), we get a palindrome (73562426537).

The spelling of 31121214424 in words is "thirty-one billion, one hundred twenty-one million, two hundred fourteen thousand, four hundred twenty-four".