31201201120 has 72 divisors (see below), whose sum is σ = 77796795384. Its totient is φ = 11823591168.

The previous prime is 31201201117. The next prime is 31201201183. The reversal of 31201201120 is 2110210213.

It is a self number, because there is not a number n which added to its sum of digits gives 31201201120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212334 + ... + 327853.

It is an arithmetic number, because the mean of its divisors is an integer number (1080511047).

Almost surely, 2^31201201120 is an apocalyptic number.

It is an amenable number.

31201201120 is an abundant number, since it is smaller than the sum of its proper divisors (46595594264).

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

31201201120 is a wasteful number, since it uses less digits than its factorization.

31201201120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540240 (or 540213 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31201201120 its reverse (2110210213), we get a palindrome (33311411333).

The spelling of 31201201120 in words is "thirty-one billion, two hundred one million, two hundred one thousand, one hundred twenty".