23220121 has 4 divisors (see below), whose sum is σ = 23244544. Its totient is φ = 23195700.

The previous prime is 23220091. The next prime is 23220139. The reversal of 23220121 is 12102232.

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 23220121 - 2²³ = 14831513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23220221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10725 + ... + 12706.

It is an arithmetic number, because the mean of its divisors is an integer number (5811136).

Almost surely, 2^23220121 is an apocalyptic number.

It is an amenable number.

23220121 is a deficient number, since it is larger than the sum of its proper divisors (24423).

23220121 is an equidigital number, since it uses as much as digits as its factorization.

23220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24422.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 23220121 is about 4818.7260764646. The cubic root of 23220121 is about 285.2910579430.

Adding to 23220121 its reverse (12102232), we get a palindrome (35322353).

The spelling of 23220121 in words is "twenty-three million, two hundred twenty thousand, one hundred twenty-one".