31212104120 has 16 divisors (see below), whose sum is σ = 70227234360. Its totient is φ = 12484841632.

The previous prime is 31212104113. The next prime is 31212104129. The reversal of 31212104120 is 2140121213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212104129) 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 3 ways as a sum of consecutive naturals, for example, 390151262 + ... + 390151341.

Almost surely, 2^31212104120 is an apocalyptic number.

It is an amenable number.

31212104120 is an abundant number, since it is smaller than the sum of its proper divisors (39015130240).

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

31212104120 is a wasteful number, since it uses less digits than its factorization.

31212104120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780302614 (or 780302610 counting only the distinct ones).

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

Adding to 31212104120 its reverse (2140121213), we get a palindrome (33352225333).

The spelling of 31212104120 in words is "thirty-one billion, two hundred twelve million, one hundred four thousand, one hundred twenty".