22151350021 has 4 divisors (see below), whose sum is σ = 22157924544. Its totient is φ = 22144775500.

The previous prime is 22151349991. The next prime is 22151350027. The reversal of 22151350021 is 12005315122.

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 22151350021 - 2²⁹ = 21614479109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22151349974 and 22151350001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22151350027) 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, 3282205 + ... + 3288946.

It is an arithmetic number, because the mean of its divisors is an integer number (5539481136).

Almost surely, 2^22151350021 is an apocalyptic number.

It is an amenable number.

22151350021 is a deficient number, since it is larger than the sum of its proper divisors (6574523).

22151350021 is an equidigital number, since it uses as much as digits as its factorization.

22151350021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6574522.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 22151350021 its reverse (12005315122), we get a palindrome (34156665143).

The spelling of 22151350021 in words is "twenty-two billion, one hundred fifty-one million, three hundred fifty thousand, twenty-one".