23220223121 has 4 divisors (see below), whose sum is σ = 24020920500. Its totient is φ = 22419525744.

The previous prime is 23220223093. The next prime is 23220223151. The reversal of 23220223121 is 12132202232.

It is a happy number.

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 18641806225 + 4578416896 = 136535^2 + 67664^2 .

It is a cyclic number.

It is not a de Polignac number, because 23220223121 - 2²² = 23216028817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23220223093 and 23220223102.

It is not an unprimeable number, because it can be changed into a prime (23220223151) 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, 400348646 + ... + 400348703.

It is an arithmetic number, because the mean of its divisors is an integer number (6005230125).

Almost surely, 2^23220223121 is an apocalyptic number.

It is an amenable number.

23220223121 is a deficient number, since it is larger than the sum of its proper divisors (800697379).

23220223121 is an equidigital number, since it uses as much as digits as its factorization.

23220223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800697378.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 23220223121 its reverse (12132202232), we get a palindrome (35352425353).

The spelling of 23220223121 in words is "twenty-three billion, two hundred twenty million, two hundred twenty-three thousand, one hundred twenty-one".