23131220213311 has 12 divisors (see below), whose sum is σ = 26967674152800. Its totient is φ = 19782602568960.

The previous prime is 23131220213263. The next prime is 23131220213377. The reversal of 23131220213311 is 11331202213132.

It is not a de Polignac number, because 23131220213311 - 2⁷ = 23131220213183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131224213311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 525663655 + ... + 525707656.

It is an arithmetic number, because the mean of its divisors is an integer number (2247306179400).

Almost surely, 2^{23131220213311} is an apocalyptic number.

23131220213311 is a deficient number, since it is larger than the sum of its proper divisors (3836453939489).

23131220213311 is a wasteful number, since it uses less digits than its factorization.

23131220213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051371774 (or 1051371767 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 23131220213311 its reverse (11331202213132), we get a palindrome (34462422426443).

The spelling of 23131220213311 in words is "twenty-three trillion, one hundred thirty-one billion, two hundred twenty million, two hundred thirteen thousand, three hundred eleven".