23311221121 has 4 divisors (see below), whose sum is σ = 23369354244. Its totient is φ = 23253088000.

The previous prime is 23311221107. The next prime is 23311221149. The reversal of 23311221121 is 12112211332.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11574532225 + 11736688896 = 107585^2 + 108336^2 .

It is a cyclic number.

It is not a de Polignac number, because 23311221121 - 2⁷ = 23311220993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23311221191) 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, 29065960 + ... + 29066761.

It is an arithmetic number, because the mean of its divisors is an integer number (5842338561).

Almost surely, 2^23311221121 is an apocalyptic number.

It is an amenable number.

23311221121 is a deficient number, since it is larger than the sum of its proper divisors (58133123).

23311221121 is an equidigital number, since it uses as much as digits as its factorization.

23311221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58133122.

The product of its digits is 144, while the sum is 19.

Adding to 23311221121 its reverse (12112211332), we get a palindrome (35423432453).

The spelling of 23311221121 in words is "twenty-three billion, three hundred eleven million, two hundred twenty-one thousand, one hundred twenty-one".