31311012110201 has 4 divisors (see below), whose sum is σ = 31318861452900. Its totient is φ = 31303162767504.

The previous prime is 31311012110173. The next prime is 31311012110251. The reversal of 31311012110201 is 10201121011313.

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 6182607655225 + 25128404454976 = 2486485^2 + 5012824^2 .

It is a cyclic number.

It is not a de Polignac number, because 31311012110201 - 2²² = 31311007915897 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 31311012110201.

It is not an unprimeable number, because it can be changed into a prime (31311012110251) 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, 3924665366 + ... + 3924673343.

It is an arithmetic number, because the mean of its divisors is an integer number (7829715363225).

Almost surely, 2^{31311012110201} is an apocalyptic number.

It is an amenable number.

31311012110201 is a deficient number, since it is larger than the sum of its proper divisors (7849342699).

31311012110201 is an equidigital number, since it uses as much as digits as its factorization.

31311012110201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7849342698.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 31311012110201 its reverse (10201121011313), we get a palindrome (41512133121514).

The spelling of 31311012110201 in words is "thirty-one trillion, three hundred eleven billion, twelve million, one hundred ten thousand, two hundred one".