22124152432021 has 4 divisors (see below), whose sum is σ = 22137971392044. Its totient is φ = 22110333472000.

The previous prime is 22124152431961. The next prime is 22124152432051. The reversal of 22124152432021 is 12023425142122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16500567043921 + 5623585388100 = 4062089^2 + 2371410^2 .

It is a cyclic number.

It is not a de Polignac number, because 22124152432021 - 2¹⁵ = 22124152399253 is a prime.

It is a super-2 number, since 2×22124152432021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22124152432051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6909477610 + ... + 6909480811.

It is an arithmetic number, because the mean of its divisors is an integer number (5534492848011).

Almost surely, 2^{22124152432021} is an apocalyptic number.

It is an amenable number.

22124152432021 is a deficient number, since it is larger than the sum of its proper divisors (13818960023).

22124152432021 is a wasteful number, since it uses less digits than its factorization.

22124152432021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13818960022.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 22124152432021 its reverse (12023425142122), we get a palindrome (34147577574143).

The spelling of 22124152432021 in words is "twenty-two trillion, one hundred twenty-four billion, one hundred fifty-two million, four hundred thirty-two thousand, twenty-one".