311212113321 has 16 divisors (see below), whose sum is σ = 417512513600. Its totient is φ = 206194714560.

The previous prime is 311212113269. The next prime is 311212113367. The reversal of 311212113321 is 123311212113.

It is a de Polignac number, because none of the positive numbers 2^k-311212113321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311212114321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 656106 + ... + 1026108.

It is an arithmetic number, because the mean of its divisors is an integer number (26094532100).

Almost surely, 2^311212113321 is an apocalyptic number.

It is an amenable number.

311212113321 is a deficient number, since it is larger than the sum of its proper divisors (106300400279).

311212113321 is a wasteful number, since it uses less digits than its factorization.

311212113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371736.

The product of its digits is 216, while the sum is 21.

Adding to 311212113321 its reverse (123311212113), we get a palindrome (434523325434).

The spelling of 311212113321 in words is "three hundred eleven billion, two hundred twelve million, one hundred thirteen thousand, three hundred twenty-one".