10311371220 has 24 divisors (see below), whose sum is σ = 28871839584. Its totient is φ = 2749698976.

The previous prime is 10311371179. The next prime is 10311371227. The reversal of 10311371220 is 2217311301.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10311371227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85928034 + ... + 85928153.

It is an arithmetic number, because the mean of its divisors is an integer number (1202993316).

Almost surely, 2^10311371220 is an apocalyptic number.

10311371220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10311371220 is an abundant number, since it is smaller than the sum of its proper divisors (18560468364).

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

10311371220 is a wasteful number, since it uses less digits than its factorization.

10311371220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171856199 (or 171856197 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

Adding to 10311371220 its reverse (2217311301), we get a palindrome (12528682521).

The spelling of 10311371220 in words is "ten billion, three hundred eleven million, three hundred seventy-one thousand, two hundred twenty".