311210133213 has 16 divisors (see below), whose sum is σ = 475055499776. Its totient is φ = 177522911280.

The previous prime is 311210133209. The next prime is 311210133307. The reversal of 311210133213 is 312331012113.

It is a happy number.

It is not a de Polignac number, because 311210133213 - 2² = 311210133209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311210133213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311210133203) 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, 12964831 + ... + 12988812.

It is an arithmetic number, because the mean of its divisors is an integer number (29690968736).

Almost surely, 2^311210133213 is an apocalyptic number.

It is an amenable number.

311210133213 is a deficient number, since it is larger than the sum of its proper divisors (163845366563).

311210133213 is a wasteful number, since it uses less digits than its factorization.

311210133213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25954224.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 311210133213 its reverse (312331012113), we get a palindrome (623541145326).

The spelling of 311210133213 in words is "three hundred eleven billion, two hundred ten million, one hundred thirty-three thousand, two hundred thirteen".