31033130131220 has 24 divisors (see below), whose sum is σ = 74479512315264. Its totient is φ = 10639930330656.

The previous prime is 31033130131207. The next prime is 31033130131249. The reversal of 31033130131220 is 2213103133013.

It is a congruent number.

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, 110832607472 + ... + 110832607751.

It is an arithmetic number, because the mean of its divisors is an integer number (3103313013136).

Almost surely, 2^{31033130131220} is an apocalyptic number.

It is an amenable number.

31033130131220 is an abundant number, since it is smaller than the sum of its proper divisors (43446382184044).

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

31033130131220 is a wasteful number, since it uses less digits than its factorization.

31033130131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221665215239 (or 221665215237 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31033130131220 its reverse (2213103133013), we get a palindrome (33246233264233).

The spelling of 31033130131220 in words is "thirty-one trillion, thirty-three billion, one hundred thirty million, one hundred thirty-one thousand, two hundred twenty".