213131111111233 has 16 divisors (see below), whose sum is σ = 243762834180096. Its totient is φ = 182545542469440.

The previous prime is 213131111111197. The next prime is 213131111111239. The reversal of 213131111111233 is 332111111131312.

It is a cyclic number.

It is not a de Polignac number, because 213131111111233 - 2²¹ = 213131109014081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213131111111198 and 213131111111207.

It is not an unprimeable number, because it can be changed into a prime (213131111111239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50165935 + ... + 54248347.

It is an arithmetic number, because the mean of its divisors is an integer number (15235177136256).

Almost surely, 2^{213131111111233} is an apocalyptic number.

It is an amenable number.

213131111111233 is a deficient number, since it is larger than the sum of its proper divisors (30631723068863).

213131111111233 is a wasteful number, since it uses less digits than its factorization.

213131111111233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088064.

The product of its digits is 324, while the sum is 25.

Adding to 213131111111233 its reverse (332111111131312), we get a palindrome (545242222242545).

The spelling of 213131111111233 in words is "two hundred thirteen trillion, one hundred thirty-one billion, one hundred eleven million, one hundred eleven thousand, two hundred thirty-three".