21122433430500 has 96 divisors (see below), whose sum is σ = 62516862914688. Its totient is φ = 5540310384000.

The previous prime is 21122433430489. The next prime is 21122433430517. The reversal of 21122433430500 is 503433422112.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115331634 + ... + 115514633.

It is an arithmetic number, because the mean of its divisors is an integer number (651217322028).

Almost surely, 2^{21122433430500} is an apocalyptic number.

21122433430500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122433430500 is an abundant number, since it is smaller than the sum of its proper divisors (41394429484188).

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

21122433430500 is a wasteful number, since it uses less digits than its factorization.

21122433430500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230846350 (or 230846338 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 21122433430500 its reverse (503433422112), we get a palindrome (21625866852612).

The spelling of 21122433430500 in words is "twenty-one trillion, one hundred twenty-two billion, four hundred thirty-three million, four hundred thirty thousand, five hundred".