311203131312 has 20 divisors (see below), whose sum is σ = 803941422680. Its totient is φ = 103734377088.

The previous prime is 311203131307. The next prime is 311203131313. The reversal of 311203131312 is 213131302113.

It is a happy number.

311203131312 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (311203131313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3241699237 + ... + 3241699332.

It is an arithmetic number, because the mean of its divisors is an integer number (40197071134).

Almost surely, 2^311203131312 is an apocalyptic number.

It is an amenable number.

311203131312 is an abundant number, since it is smaller than the sum of its proper divisors (492738291368).

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

311203131312 is a wasteful number, since it uses less digits than its factorization.

311203131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6483398580 (or 6483398574 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 311203131312 its reverse (213131302113), we get a palindrome (524334433425).

The spelling of 311203131312 in words is "three hundred eleven billion, two hundred three million, one hundred thirty-one thousand, three hundred twelve".