23220213121 has 4 divisors (see below), whose sum is σ = 26537386432. Its totient is φ = 19903039812.

The previous prime is 23220213097. The next prime is 23220213131. The reversal of 23220213121 is 12131202232.

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 23220213121 - 2¹³ = 23220204929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23220213131) 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, 1658586645 + ... + 1658586658.

It is an arithmetic number, because the mean of its divisors is an integer number (6634346608).

Almost surely, 2^23220213121 is an apocalyptic number.

It is an amenable number.

23220213121 is a deficient number, since it is larger than the sum of its proper divisors (3317173311).

23220213121 is an equidigital number, since it uses as much as digits as its factorization.

23220213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317173310.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 23220213121 its reverse (12131202232), we get a palindrome (35351415353).

The spelling of 23220213121 in words is "twenty-three billion, two hundred twenty million, two hundred thirteen thousand, one hundred twenty-one".