31213201122211 has 4 divisors (see below), whose sum is σ = 31223398185424. Its totient is φ = 31203004059000.

The previous prime is 31213201122203. The next prime is 31213201122277. The reversal of 31213201122211 is 11222110231213.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31213201122211 - 2³ = 31213201122203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213201122281) 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, 5098527015 + ... + 5098533136.

It is an arithmetic number, because the mean of its divisors is an integer number (7805849546356).

Almost surely, 2^{31213201122211} is an apocalyptic number.

31213201122211 is a deficient number, since it is larger than the sum of its proper divisors (10197063213).

31213201122211 is a wasteful number, since it uses less digits than its factorization.

31213201122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10197063212.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 31213201122211 its reverse (11222110231213), we get a palindrome (42435311353424).

The spelling of 31213201122211 in words is "thirty-one trillion, two hundred thirteen billion, two hundred one million, one hundred twenty-two thousand, two hundred eleven".