10311031220 has 48 divisors (see below), whose sum is σ = 24872158080. Its totient is φ = 3517256064.

The previous prime is 10311031217. The next prime is 10311031243. The reversal of 10311031220 is 2213011301.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 10311031195 and 10311031204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159350 + ... + 214509.

It is an arithmetic number, because the mean of its divisors is an integer number (518169960).

Almost surely, 2^10311031220 is an apocalyptic number.

10311031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10311031220 is an abundant number, since it is smaller than the sum of its proper divisors (14561126860).

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

10311031220 is a wasteful number, since it uses less digits than its factorization.

10311031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374072 (or 374070 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 10311031220 its reverse (2213011301), we get a palindrome (12524042521).

The spelling of 10311031220 in words is "ten billion, three hundred eleven million, thirty-one thousand, two hundred twenty".