311231002131201 has 4 divisors (see below), whose sum is σ = 414974669508272. Its totient is φ = 207487334754132.

The previous prime is 311231002131149. The next prime is 311231002131209. The reversal of 311231002131201 is 102131200132113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 311231002131201 - 2¹⁷ = 311231002000129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311231002131209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51871833688531 + ... + 51871833688536.

It is an arithmetic number, because the mean of its divisors is an integer number (103743667377068).

Almost surely, 2^{311231002131201} is an apocalyptic number.

It is an amenable number.

311231002131201 is a deficient number, since it is larger than the sum of its proper divisors (103743667377071).

311231002131201 is a wasteful number, since it uses less digits than its factorization.

311231002131201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103743667377070.

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

Adding to 311231002131201 its reverse (102131200132113), we get a palindrome (413362202263314).

The spelling of 311231002131201 in words is "three hundred eleven trillion, two hundred thirty-one billion, two million, one hundred thirty-one thousand, two hundred one".