31201202120 has 64 divisors (see below), whose sum is σ = 77135889600. Its totient is φ = 11264244480.

The previous prime is 31201202113. The next prime is 31201202141. The reversal of 31201202120 is 2120210213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31201202095 and 31201202104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193919 + ... + 316238.

It is an arithmetic number, because the mean of its divisors is an integer number (1205248275).

Almost surely, 2^31201202120 is an apocalyptic number.

It is an amenable number.

31201202120 is an abundant number, since it is smaller than the sum of its proper divisors (45934687480).

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

31201202120 is a wasteful number, since it uses less digits than its factorization.

31201202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510318 (or 510314 counting only the distinct ones).

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

Adding to 31201202120 its reverse (2120210213), we get a palindrome (33321412333).

The spelling of 31201202120 in words is "thirty-one billion, two hundred one million, two hundred two thousand, one hundred twenty".