22124044020421 has 4 divisors (see below), whose sum is σ = 25284621737632. Its totient is φ = 18963466303212.

The previous prime is 22124044020413. The next prime is 22124044020433. The reversal of 22124044020421 is 12402044042122.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 22124044020421 - 2³ = 22124044020413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22124044020421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22124044020121) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1580288858595 + ... + 1580288858608.

It is an arithmetic number, because the mean of its divisors is an integer number (6321155434408).

Almost surely, 2^{22124044020421} is an apocalyptic number.

It is an amenable number.

22124044020421 is a deficient number, since it is larger than the sum of its proper divisors (3160577717211).

22124044020421 is an equidigital number, since it uses as much as digits as its factorization.

22124044020421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160577717210.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 22124044020421 its reverse (12402044042122), we get a palindrome (34526088062543).

The spelling of 22124044020421 in words is "twenty-two trillion, one hundred twenty-four billion, forty-four million, twenty thousand, four hundred twenty-one".