312211311020 has 24 divisors (see below), whose sum is σ = 749307146784. Its totient is φ = 107043878016.

The previous prime is 312211310989. The next prime is 312211311037. The reversal of 312211311020 is 20113112213.

It is a self number, because there is not a number n which added to its sum of digits gives 312211311020.

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, 1115040257 + ... + 1115040536.

It is an arithmetic number, because the mean of its divisors is an integer number (31221131116).

Almost surely, 2^312211311020 is an apocalyptic number.

It is an amenable number.

312211311020 is an abundant number, since it is smaller than the sum of its proper divisors (437095835764).

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

312211311020 is a wasteful number, since it uses less digits than its factorization.

312211311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230080809 (or 2230080807 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 312211311020 its reverse (20113112213), we get a palindrome (332324423233).

The spelling of 312211311020 in words is "three hundred twelve billion, two hundred eleven million, three hundred eleven thousand, twenty".