311112001111201 has 4 divisors (see below), whose sum is σ = 311113643598612. Its totient is φ = 311110358623792.

The previous prime is 311112001111159. The next prime is 311112001111213. The reversal of 311112001111201 is 102111100211113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85211822550625 + 225900178560576 = 9231025^2 + 15029976^2 .

It is a cyclic number.

It is not a de Polignac number, because 311112001111201 - 2²¹ = 311111999014049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311112001171201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820959550 + ... + 821338423.

It is an arithmetic number, because the mean of its divisors is an integer number (77778410899653).

Almost surely, 2^{311112001111201} is an apocalyptic number.

It is an amenable number.

311112001111201 is a deficient number, since it is larger than the sum of its proper divisors (1642487411).

311112001111201 is a wasteful number, since it uses less digits than its factorization.

311112001111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642487410.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 311112001111201 its reverse (102111100211113), we get a palindrome (413223101322314).

The spelling of 311112001111201 in words is "three hundred eleven trillion, one hundred twelve billion, one million, one hundred eleven thousand, two hundred one".