23221221123 has 4 divisors (see below), whose sum is σ = 30961628168. Its totient is φ = 15480814080.

The previous prime is 23221221113. The next prime is 23221221131. The reversal of 23221221123 is 32112212232.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23221221123 - 2²¹ = 23219123971 is a prime.

It is a super-2 number, since 2×23221221123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23221221123.

It is not an unprimeable number, because it can be changed into a prime (23221221103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3870203518 + ... + 3870203523.

It is an arithmetic number, because the mean of its divisors is an integer number (7740407042).

Almost surely, 2^23221221123 is an apocalyptic number.

23221221123 is a deficient number, since it is larger than the sum of its proper divisors (7740407045).

23221221123 is an equidigital number, since it uses as much as digits as its factorization.

23221221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7740407044.

The product of its digits is 576, while the sum is 21.

Adding to 23221221123 its reverse (32112212232), we get a palindrome (55333433355).

The spelling of 23221221123 in words is "twenty-three billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-three".