22142364521 has 4 divisors (see below), whose sum is σ = 22156127700. Its totient is φ = 22128601344.

The previous prime is 22142364499. The next prime is 22142364547. The reversal of 22142364521 is 12546324122.

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 20345028496 + 1797336025 = 142636^2 + 42395^2 .

It is a cyclic number.

It is not a de Polignac number, because 22142364521 - 2³⁴ = 4962495337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22142364581) 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, 6879176 + ... + 6882393.

It is an arithmetic number, because the mean of its divisors is an integer number (5539031925).

Almost surely, 2^22142364521 is an apocalyptic number.

It is an amenable number.

22142364521 is a deficient number, since it is larger than the sum of its proper divisors (13763179).

22142364521 is a wasteful number, since it uses less digits than its factorization.

22142364521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13763178.

The product of its digits is 23040, while the sum is 32.

Adding to 22142364521 its reverse (12546324122), we get a palindrome (34688688643).

The spelling of 22142364521 in words is "twenty-two billion, one hundred forty-two million, three hundred sixty-four thousand, five hundred twenty-one".