311120123231000 has 64 divisors (see below), whose sum is σ = 728370599280480. Its totient is φ = 124388303836800.

The previous prime is 311120123230957. The next prime is 311120123231009. The reversal of 311120123231000 is 132321021113.

It is a happy number.

It is a super-2 number, since 2×311120123231000² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311120123231009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72597779 + ... + 76763778.

Almost surely, 2^{311120123231000} is an apocalyptic number.

It is an amenable number.

311120123231000 is an abundant number, since it is smaller than the sum of its proper divisors (417250476049480).

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

311120123231000 is a wasteful number, since it uses less digits than its factorization.

311120123231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149363661 (or 149363647 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 311120123231000 its reverse (132321021113), we get a palindrome (311252444252113).

The spelling of 311120123231000 in words is "three hundred eleven trillion, one hundred twenty billion, one hundred twenty-three million, two hundred thirty-one thousand".