311331230112 has 96 divisors (see below), whose sum is σ = 935167185792. Its totient is φ = 88840018944.

The previous prime is 311331230033. The next prime is 311331230129. The reversal of 311331230112 is 211032133113.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 244938 + ... + 826230.

It is an arithmetic number, because the mean of its divisors is an integer number (9741324852).

Almost surely, 2^311331230112 is an apocalyptic number.

311331230112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311331230112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467583592896).

311331230112 is an abundant number, since it is smaller than the sum of its proper divisors (623835955680).

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

311331230112 is a wasteful number, since it uses less digits than its factorization.

311331230112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582110 (or 582102 counting only the distinct ones).

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

Adding to 311331230112 its reverse (211032133113), we get a palindrome (522363363225).

The spelling of 311331230112 in words is "three hundred eleven billion, three hundred thirty-one million, two hundred thirty thousand, one hundred twelve".