22431221123 has 4 divisors (see below), whose sum is σ = 22436061120. Its totient is φ = 22426381128.

The previous prime is 22431221101. The next prime is 22431221147. The reversal of 22431221123 is 32112213422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32112213422 = 2 ⋅16056106711.

It is a cyclic number.

It is not a de Polignac number, because 22431221123 - 2¹² = 22431217027 is a prime.

It is a super-2 number, since 2×22431221123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22431221173) 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, 2413040 + ... + 2422317.

It is an arithmetic number, because the mean of its divisors is an integer number (5609015280).

Almost surely, 2^22431221123 is an apocalyptic number.

22431221123 is a deficient number, since it is larger than the sum of its proper divisors (4839997).

22431221123 is an equidigital number, since it uses as much as digits as its factorization.

22431221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4839996.

The product of its digits is 1152, while the sum is 23.

Adding to 22431221123 its reverse (32112213422), we get a palindrome (54543434545).

The spelling of 22431221123 in words is "twenty-two billion, four hundred thirty-one million, two hundred twenty-one thousand, one hundred twenty-three".