22121223432 has 128 divisors (see below), whose sum is σ = 71327001600. Its totient is φ = 5547628800.

The previous prime is 22121223419. The next prime is 22121223493. The reversal of 22121223432 is 23432212122.

It is a super-2 number, since 2×22121223432² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

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 31 ways as a sum of consecutive naturals, for example, 152794 + ... + 259977.

It is an arithmetic number, because the mean of its divisors is an integer number (557242200).

Almost surely, 2^22121223432 is an apocalyptic number.

22121223432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22121223432 is an abundant number, since it is smaller than the sum of its proper divisors (49205778168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121223432 is a wasteful number, since it uses less digits than its factorization.

22121223432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412827 (or 412823 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

Adding to 22121223432 its reverse (23432212122), we get a palindrome (45553435554).

The spelling of 22121223432 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-three thousand, four hundred thirty-two".