22142780171321 has 12 divisors (see below), whose sum is σ = 22427369508852. Its totient is φ = 21861757741824.

The previous prime is 22142780171299. The next prime is 22142780171327. The reversal of 22142780171321 is 12317108724122.

It can be written as a sum of positive squares in 2 ways, for example, as 17623707763600 + 4519072407721 = 4198060^2 + 2125811^2 .

It is not a de Polignac number, because 22142780171321 - 2²² = 22142775977017 is a prime.

It is a super-2 number, since 2×22142780171321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22142780171327) 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 11 ways as a sum of consecutive naturals, for example, 370541981 + ... + 370601733.

It is an arithmetic number, because the mean of its divisors is an integer number (1868947459071).

Almost surely, 2^{22142780171321} is an apocalyptic number.

It is an amenable number.

22142780171321 is a deficient number, since it is larger than the sum of its proper divisors (284589337531).

22142780171321 is an frugal number, since it uses more digits than its factorization.

22142780171321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119288 (or 119209 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

Adding to 22142780171321 its reverse (12317108724122), we get a palindrome (34459888895443).

The spelling of 22142780171321 in words is "twenty-two trillion, one hundred forty-two billion, seven hundred eighty million, one hundred seventy-one thousand, three hundred twenty-one".