311201131023213 has 24 divisors (see below), whose sum is σ = 443847301283232. Its totient is φ = 193832049209568.

The previous prime is 311201131023169. The next prime is 311201131023229. The reversal of 311201131023213 is 312320131102113.

It is not a de Polignac number, because 311201131023213 - 2⁹ = 311201131022701 is a prime.

It is a super-2 number, since 2×311201131023213² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311201131023313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2280094206 + ... + 2280230687.

It is an arithmetic number, because the mean of its divisors is an integer number (18493637553468).

Almost surely, 2^{311201131023213} is an apocalyptic number.

It is an amenable number.

311201131023213 is a deficient number, since it is larger than the sum of its proper divisors (132646170260019).

311201131023213 is a wasteful number, since it uses less digits than its factorization.

311201131023213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560324985 (or 4560324962 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 311201131023213 its reverse (312320131102113), we get a palindrome (623521262125326).

The spelling of 311201131023213 in words is "three hundred eleven trillion, two hundred one billion, one hundred thirty-one million, twenty-three thousand, two hundred thirteen".