23131233211 has 4 divisors (see below), whose sum is σ = 23360255424. Its totient is φ = 22902211000.

The previous prime is 23131233197. The next prime is 23131233299. The reversal of 23131233211 is 11233213132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23131233211 is a prime.

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 (23131233511) 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, 114510955 + ... + 114511156.

It is an arithmetic number, because the mean of its divisors is an integer number (5840063856).

Almost surely, 2^23131233211 is an apocalyptic number.

23131233211 is a deficient number, since it is larger than the sum of its proper divisors (229022213).

23131233211 is a wasteful number, since it uses less digits than its factorization.

23131233211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229022212.

The product of its digits is 648, while the sum is 22.

Adding to 23131233211 its reverse (11233213132), we get a palindrome (34364446343).

The spelling of 23131233211 in words is "twenty-three billion, one hundred thirty-one million, two hundred thirty-three thousand, two hundred eleven".