31320102001220 has 48 divisors (see below), whose sum is σ = 65789252500608. Its totient is φ = 12524795969280.

The previous prime is 31320102001171. The next prime is 31320102001229. The reversal of 31320102001220 is 2210020102313.

It is not an unprimeable number, because it can be changed into a prime (31320102001229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2463621584 + ... + 2463634296.

It is an arithmetic number, because the mean of its divisors is an integer number (1370609427096).

Almost surely, 2^{31320102001220} is an apocalyptic number.

It is an amenable number.

31320102001220 is an abundant number, since it is smaller than the sum of its proper divisors (34469150499388).

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

31320102001220 is a wasteful number, since it uses less digits than its factorization.

31320102001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34940 (or 34938 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31320102001220 its reverse (2210020102313), we get a palindrome (33530122103533).

The spelling of 31320102001220 in words is "thirty-one trillion, three hundred twenty billion, one hundred two million, one thousand, two hundred twenty".