31113020210120 has 32 divisors (see below), whose sum is σ = 73688732078400. Its totient is φ = 11790197131968.

The previous prime is 31113020210113. The next prime is 31113020210137. The reversal of 31113020210120 is 2101202031113.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20469091484 + ... + 20469093003.

It is an arithmetic number, because the mean of its divisors is an integer number (2302772877450).

Almost surely, 2^{31113020210120} is an apocalyptic number.

It is an amenable number.

31113020210120 is an abundant number, since it is smaller than the sum of its proper divisors (42575711868280).

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

31113020210120 is a wasteful number, since it uses less digits than its factorization.

31113020210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40938184517 (or 40938184513 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31113020210120 its reverse (2101202031113), we get a palindrome (33214222241233).

The spelling of 31113020210120 in words is "thirty-one trillion, one hundred thirteen billion, twenty million, two hundred ten thousand, one hundred twenty".