22245132421 has 4 divisors (see below), whose sum is σ = 22420291072. Its totient is φ = 22069973772.

The previous prime is 22245132409. The next prime is 22245132439. The reversal of 22245132421 is 12423154222.

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 22245132421 - 2²³ = 22236743813 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 22245132421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22245132491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87579135 + ... + 87579388.

It is an arithmetic number, because the mean of its divisors is an integer number (5605072768).

Almost surely, 2^22245132421 is an apocalyptic number.

It is an amenable number.

22245132421 is a deficient number, since it is larger than the sum of its proper divisors (175158651).

22245132421 is a wasteful number, since it uses less digits than its factorization.

22245132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175158650.

The product of its digits is 7680, while the sum is 28.

Adding to 22245132421 its reverse (12423154222), we get a palindrome (34668286643).

The spelling of 22245132421 in words is "twenty-two billion, two hundred forty-five million, one hundred thirty-two thousand, four hundred twenty-one".