311123001312 has 36 divisors (see below), whose sum is σ = 884756035800. Its totient is φ = 103707667008.

The previous prime is 311123001311. The next prime is 311123001337. The reversal of 311123001312 is 213100321113.

311123001312 is a `hidden beast` number, since 311 + 12 + 30 + 0 + 1 + 312 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311123001311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 540143812 + ... + 540144387.

It is an arithmetic number, because the mean of its divisors is an integer number (24576556550).

Almost surely, 2^311123001312 is an apocalyptic number.

311123001312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

311123001312 is an abundant number, since it is smaller than the sum of its proper divisors (573633034488).

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

311123001312 is a wasteful number, since it uses less digits than its factorization.

311123001312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080288215 (or 1080288204 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 311123001312 its reverse (213100321113), we get a palindrome (524223322425).

The spelling of 311123001312 in words is "three hundred eleven billion, one hundred twenty-three million, one thousand, three hundred twelve".