311122013201 has 4 divisors (see below), whose sum is σ = 311124965172. Its totient is φ = 311119061232.

The previous prime is 311122013197. The next prime is 311122013203. The reversal of 311122013201 is 102310221113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102310221113 = 601 ⋅170233313.

It can be written as a sum of positive squares in 2 ways, for example, as 39134730625 + 271987282576 = 197825^2 + 521524^2 .

It is a cyclic number.

It is not a de Polignac number, because 311122013201 - 2² = 311122013197 is a prime.

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 311122013201.

It is not an unprimeable number, because it can be changed into a prime (311122013203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1311806 + ... + 1530711.

It is an arithmetic number, because the mean of its divisors is an integer number (77781241293).

Almost surely, 2^311122013201 is an apocalyptic number.

It is an amenable number.

311122013201 is a deficient number, since it is larger than the sum of its proper divisors (2951971).

311122013201 is a wasteful number, since it uses less digits than its factorization.

311122013201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951970.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 311122013201 its reverse (102310221113), we get a palindrome (413432234314).

The spelling of 311122013201 in words is "three hundred eleven billion, one hundred twenty-two million, thirteen thousand, two hundred one".