31211000120 has 16 divisors (see below), whose sum is σ = 70224750360. Its totient is φ = 12484400032.

The previous prime is 31211000083. The next prime is 31211000137. The reversal of 31211000120 is 2100011213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390137462 + ... + 390137541.

Almost surely, 2^31211000120 is an apocalyptic number.

It is an amenable number.

31211000120 is an abundant number, since it is smaller than the sum of its proper divisors (39013750240).

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

31211000120 is a wasteful number, since it uses less digits than its factorization.

31211000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780275014 (or 780275010 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 31211000120 its reverse (2100011213), we get a palindrome (33311011333).

The spelling of 31211000120 in words is "thirty-one billion, two hundred eleven million, one hundred twenty", and thus it is an aban number.