311212110312 has 32 divisors (see below), whose sum is σ = 864478084800. Its totient is φ = 103737370032.

The previous prime is 311212110311. The next prime is 311212110317. The reversal of 311212110312 is 213011212113.

311212110312 is a `hidden beast` number, since 31 + 1 + 212 + 110 + 312 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (311212110311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720398188 + ... + 720398619.

It is an arithmetic number, because the mean of its divisors is an integer number (27014940150).

Almost surely, 2^311212110312 is an apocalyptic number.

It is an amenable number.

311212110312 is an abundant number, since it is smaller than the sum of its proper divisors (553265974488).

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

311212110312 is a wasteful number, since it uses less digits than its factorization.

311212110312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440796822 (or 1440796812 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 311212110312 its reverse (213011212113), we get a palindrome (524223322425).

The spelling of 311212110312 in words is "three hundred eleven billion, two hundred twelve million, one hundred ten thousand, three hundred twelve".