211313213131 has 4 divisors (see below), whose sum is σ = 213405423264. Its totient is φ = 209221003000.

The previous prime is 211313213129. The next prime is 211313213149. The reversal of 211313213131 is 131312313112.

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 211313213131 - 2¹ = 211313213129 is a prime.

It is a super-2 number, since 2×211313213131² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211313213171) 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, 1046104915 + ... + 1046105116.

It is an arithmetic number, because the mean of its divisors is an integer number (53351355816).

Almost surely, 2^211313213131 is an apocalyptic number.

211313213131 is a deficient number, since it is larger than the sum of its proper divisors (2092210133).

211313213131 is a wasteful number, since it uses less digits than its factorization.

211313213131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092210132.

The product of its digits is 324, while the sum is 22.

Adding to 211313213131 its reverse (131312313112), we get a palindrome (342625526243).

The spelling of 211313213131 in words is "two hundred eleven billion, three hundred thirteen million, two hundred thirteen thousand, one hundred thirty-one".