22021157165 has 16 divisors (see below), whose sum is σ = 30206265600. Its totient is φ = 15097311360.

The previous prime is 22021157141. The next prime is 22021157167. The reversal of 22021157165 is 56175112022.

It is not a de Polignac number, because 22021157165 - 2⁸ = 22021156909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021157167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132161 + ... + 248009.

It is an arithmetic number, because the mean of its divisors is an integer number (1887891600).

Almost surely, 2^22021157165 is an apocalyptic number.

It is an amenable number.

22021157165 is a deficient number, since it is larger than the sum of its proper divisors (8185108435).

22021157165 is a wasteful number, since it uses less digits than its factorization.

22021157165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121292.

The product of its (nonzero) digits is 8400, while the sum is 32.

Adding to 22021157165 its reverse (56175112022), we get a palindrome (78196269187).

The spelling of 22021157165 in words is "twenty-two billion, twenty-one million, one hundred fifty-seven thousand, one hundred sixty-five".