22145144405321 has 32 divisors (see below), whose sum is σ = 26615577296640. Its totient is φ = 18024020695296.

The previous prime is 22145144405303. The next prime is 22145144405323. The reversal of 22145144405321 is 12350444154122.

It is not a de Polignac number, because 22145144405321 - 2²² = 22145140211017 is a prime.

It is a super-2 number, since 2×22145144405321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22145144405323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7009355 + ... + 9665471.

It is an arithmetic number, because the mean of its divisors is an integer number (831736790520).

Almost surely, 2^{22145144405321} is an apocalyptic number.

It is an amenable number.

22145144405321 is a deficient number, since it is larger than the sum of its proper divisors (4470432891319).

22145144405321 is a wasteful number, since it uses less digits than its factorization.

22145144405321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656833.

The product of its (nonzero) digits is 153600, while the sum is 38.

Adding to 22145144405321 its reverse (12350444154122), we get a palindrome (34495588559443).

The spelling of 22145144405321 in words is "twenty-two trillion, one hundred forty-five billion, one hundred forty-four million, four hundred five thousand, three hundred twenty-one".