31202120012 has 48 divisors (see below), whose sum is σ = 63331107840. Its totient is φ = 13175047872.

The previous prime is 31202120011. The next prime is 31202120021. The reversal of 31202120012 is 21002120213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (31202120011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540689 + ... + 595607.

It is an arithmetic number, because the mean of its divisors is an integer number (1319398080).

Almost surely, 2^31202120012 is an apocalyptic number.

It is an amenable number.

31202120012 is an abundant number, since it is smaller than the sum of its proper divisors (32128987828).

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

31202120012 is a wasteful number, since it uses less digits than its factorization.

31202120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55230 (or 55228 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31202120012 its reverse (21002120213), we get a palindrome (52204240225).

The spelling of 31202120012 in words is "thirty-one billion, two hundred two million, one hundred twenty thousand, twelve".