23320212121 has 4 divisors (see below), whose sum is σ = 23396174032. Its totient is φ = 23244250212.

The previous prime is 23320212107. The next prime is 23320212127. The reversal of 23320212121 is 12121202332.

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 a de Polignac number, because none of the positive numbers 2^k-23320212121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23320212127) 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, 37980495 + ... + 37981108.

It is an arithmetic number, because the mean of its divisors is an integer number (5849043508).

Almost surely, 2^23320212121 is an apocalyptic number.

It is an amenable number.

23320212121 is a deficient number, since it is larger than the sum of its proper divisors (75961911).

23320212121 is an equidigital number, since it uses as much as digits as its factorization.

23320212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75961910.

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

Adding to 23320212121 its reverse (12121202332), we get a palindrome (35441414453).

The spelling of 23320212121 in words is "twenty-three billion, three hundred twenty million, two hundred twelve thousand, one hundred twenty-one".