311311120312 has 8 divisors (see below), whose sum is σ = 583708350600. Its totient is φ = 155655560152.

The previous prime is 311311120303. The next prime is 311311120313. The reversal of 311311120312 is 213021113113.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×311311120312² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 311311120312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311311120313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19456945012 + ... + 19456945027.

It is an arithmetic number, because the mean of its divisors is an integer number (72963543825).

Almost surely, 2^311311120312 is an apocalyptic number.

It is an amenable number.

311311120312 is a deficient number, since it is larger than the sum of its proper divisors (272397230288).

311311120312 is a wasteful number, since it uses less digits than its factorization.

311311120312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38913890045 (or 38913890041 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 311311120312 its reverse (213021113113), we get a palindrome (524332233425).

The spelling of 311311120312 in words is "three hundred eleven billion, three hundred eleven million, one hundred twenty thousand, three hundred twelve".