22431221125 has 8 divisors (see below), whose sum is σ = 27994164120. Its totient is φ = 17944976800.

The previous prime is 22431221101. The next prime is 22431221147. The reversal of 22431221125 is 52112213422.

It can be written as a sum of positive squares in 4 ways, for example, as 60933636 + 22370287489 = 7806^2 + 149567^2 .

It is not a de Polignac number, because 22431221125 - 2¹³ = 22431212933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 22431221125.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 89724760 + ... + 89725009.

It is an arithmetic number, because the mean of its divisors is an integer number (3499270515).

Almost surely, 2^22431221125 is an apocalyptic number.

22431221125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22431221125 is a deficient number, since it is larger than the sum of its proper divisors (5562942995).

22431221125 is an equidigital number, since it uses as much as digits as its factorization.

22431221125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179449784 (or 179449774 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

Adding to 22431221125 its reverse (52112213422), we get a palindrome (74543434547).

The spelling of 22431221125 in words is "twenty-two billion, four hundred thirty-one million, two hundred twenty-one thousand, one hundred twenty-five".