23221323121 has 4 divisors (see below), whose sum is σ = 23515264000. Its totient is φ = 22927382244.

The previous prime is 23221323101. The next prime is 23221323163. The reversal of 23221323121 is 12132312232.

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 23221323121 - 2¹³ = 23221314929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23221323092 and 23221323101.

It is not an unprimeable number, because it can be changed into a prime (23221323101) 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, 146970321 + ... + 146970478.

It is an arithmetic number, because the mean of its divisors is an integer number (5878816000).

Almost surely, 2^23221323121 is an apocalyptic number.

It is an amenable number.

23221323121 is a deficient number, since it is larger than the sum of its proper divisors (293940879).

23221323121 is an equidigital number, since it uses as much as digits as its factorization.

23221323121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293940878.

The product of its digits is 864, while the sum is 22.

Adding to 23221323121 its reverse (12132312232), we get a palindrome (35353635353).

The spelling of 23221323121 in words is "twenty-three billion, two hundred twenty-one million, three hundred twenty-three thousand, one hundred twenty-one".