20124422244021 has 4 divisors (see below), whose sum is σ = 26832562992032. Its totient is φ = 13416281496012.

The previous prime is 20124422244011. The next prime is 20124422244161. The reversal of 20124422244021 is 12044222442102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20124422244021 - 2²² = 20124418049717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20124422244021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124422244001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3354070374001 + ... + 3354070374006.

It is an arithmetic number, because the mean of its divisors is an integer number (6708140748008).

Almost surely, 2^{20124422244021} is an apocalyptic number.

It is an amenable number.

20124422244021 is a deficient number, since it is larger than the sum of its proper divisors (6708140748011).

20124422244021 is an equidigital number, since it uses as much as digits as its factorization.

20124422244021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6708140748010.

The product of its (nonzero) digits is 16384, while the sum is 30.

Adding to 20124422244021 its reverse (12044222442102), we get a palindrome (32168644686123).

The spelling of 20124422244021 in words is "twenty trillion, one hundred twenty-four billion, four hundred twenty-two million, two hundred forty-four thousand, twenty-one".