23311131121 has 4 divisors (see below), whose sum is σ = 23313804912. Its totient is φ = 23308457332.

The previous prime is 23311131079. The next prime is 23311131169. The reversal of 23311131121 is 12113111332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23311131121 - 2¹⁹ = 23310606833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23311131191) 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, 1323775 + ... + 1341268.

It is an arithmetic number, because the mean of its divisors is an integer number (5828451228).

Almost surely, 2^23311131121 is an apocalyptic number.

It is an amenable number.

23311131121 is a deficient number, since it is larger than the sum of its proper divisors (2673791).

23311131121 is an equidigital number, since it uses as much as digits as its factorization.

23311131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673790.

The product of its digits is 108, while the sum is 19.

Adding to 23311131121 its reverse (12113111332), we get a palindrome (35424242453).

It can be divided in two parts, 233111311 and 21, that added together give a palindrome (233111332).

The spelling of 23311131121 in words is "twenty-three billion, three hundred eleven million, one hundred thirty-one thousand, one hundred twenty-one".