31212321994 has 32 divisors (see below), whose sum is σ = 56175851520. Its totient is φ = 12716594352.

The previous prime is 31212321941. The next prime is 31212322003. The reversal of 31212321994 is 49912321213.

It is a super-2 number, since 2×31212321994² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 244854 + ... + 349825.

It is an arithmetic number, because the mean of its divisors is an integer number (1755495360).

Almost surely, 2^31212321994 is an apocalyptic number.

31212321994 is a deficient number, since it is larger than the sum of its proper divisors (24963529526).

31212321994 is a wasteful number, since it uses less digits than its factorization.

31212321994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594874.

The product of its digits is 23328, while the sum is 37.

The spelling of 31212321994 in words is "thirty-one billion, two hundred twelve million, three hundred twenty-one thousand, nine hundred ninety-four".