31331332111201 has 4 divisors (see below), whose sum is σ = 33174351647172. Its totient is φ = 29488312575232.

The previous prime is 31331332111169. The next prime is 31331332111207. The reversal of 31331332111201 is 10211123313313.

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 26881362956176 + 4449969155025 = 5184724^2 + 2109495^2 .

It is a cyclic number.

It is not a de Polignac number, because 31331332111201 - 2⁵ = 31331332111169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331332111207) 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, 921509767960 + ... + 921509767993.

It is an arithmetic number, because the mean of its divisors is an integer number (8293587911793).

Almost surely, 2^{31331332111201} is an apocalyptic number.

It is an amenable number.

31331332111201 is a deficient number, since it is larger than the sum of its proper divisors (1843019535971).

31331332111201 is a wasteful number, since it uses less digits than its factorization.

31331332111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843019535970.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31331332111201 its reverse (10211123313313), we get a palindrome (41542455424514).

The spelling of 31331332111201 in words is "thirty-one trillion, three hundred thirty-one billion, three hundred thirty-two million, one hundred eleven thousand, two hundred one".