22121210432 has 28 divisors (see below), whose sum is σ = 43906011756. Its totient is φ = 11058278400.

The previous prime is 22121210431. The next prime is 22121210459. The reversal of 22121210432 is 23401212122.

It can be written as a sum of positive squares in 2 ways, for example, as 12068340736 + 10052869696 = 109856^2 + 100264^2 .

It is not an unprimeable number, because it can be changed into a prime (22121210431) 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, 293432 + ... + 361032.

Almost surely, 2^22121210432 is an apocalyptic number.

It is an amenable number.

22121210432 is a deficient number, since it is larger than the sum of its proper divisors (21784801324).

22121210432 is an equidigital number, since it uses as much as digits as its factorization.

22121210432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72726 (or 72716 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 22121210432 its reverse (23401212122), we get a palindrome (45522422554).

The spelling of 22121210432 in words is "twenty-two billion, one hundred twenty-one million, two hundred ten thousand, four hundred thirty-two".