311211212113 has 32 divisors (see below), whose sum is σ = 336705811200. Its totient is φ = 286566875136.

The previous prime is 311211212093. The next prime is 311211212149. The reversal of 311211212113 is 311212112113.

It is a de Polignac number, because none of the positive numbers 2^k-311211212113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311211212183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269913745 + ... + 269914897.

It is an arithmetic number, because the mean of its divisors is an integer number (10522056600).

Almost surely, 2^311211212113 is an apocalyptic number.

It is an amenable number.

311211212113 is a deficient number, since it is larger than the sum of its proper divisors (25494599087).

311211212113 is a wasteful number, since it uses less digits than its factorization.

311211212113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281.

The product of its digits is 72, while the sum is 19.

Adding to 311211212113 its reverse (311212112113), we get a palindrome (622423324226).

The spelling of 311211212113 in words is "three hundred eleven billion, two hundred eleven million, two hundred twelve thousand, one hundred thirteen".