12311310020 has 24 divisors (see below), whose sum is σ = 25881265368. Its totient is φ = 4919283200.

The previous prime is 12311310001. The next prime is 12311310029. The reversal of 12311310020 is 2001311321.

It can be written as a sum of positive squares in 4 ways, for example, as 4242959044 + 8068350976 = 65138^2 + 89824^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12311309977 and 12311310004.

It is not an unprimeable number, because it can be changed into a prime (12311310029) 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, 308261 + ... + 345900.

It is an arithmetic number, because the mean of its divisors is an integer number (1078386057).

Almost surely, 2^12311310020 is an apocalyptic number.

12311310020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311310020 is an abundant number, since it is smaller than the sum of its proper divisors (13569955348).

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

12311310020 is a wasteful number, since it uses less digits than its factorization.

12311310020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655111 (or 655109 counting only the distinct ones).

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

Adding to 12311310020 its reverse (2001311321), we get a palindrome (14312621341).

The spelling of 12311310020 in words is "twelve billion, three hundred eleven million, three hundred ten thousand, twenty".