22055354611221 has 4 divisors (see below), whose sum is σ = 29407139481632. Its totient is φ = 14703569740812.

The previous prime is 22055354611219. The next prime is 22055354611247. The reversal of 22055354611221 is 12211645355022.

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 not a de Polignac number, because 22055354611221 - 2¹ = 22055354611219 is a prime.

It is a super-2 number, since 2×22055354611221² (a number of 27 digits) contains 22 as substring.

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 22055354611221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22055354611291) 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, 3675892435201 + ... + 3675892435206.

It is an arithmetic number, because the mean of its divisors is an integer number (7351784870408).

Almost surely, 2^{22055354611221} is an apocalyptic number.

It is an amenable number.

22055354611221 is a deficient number, since it is larger than the sum of its proper divisors (7351784870411).

22055354611221 is an equidigital number, since it uses as much as digits as its factorization.

22055354611221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7351784870410.

The product of its (nonzero) digits is 144000, while the sum is 39.

Adding to 22055354611221 its reverse (12211645355022), we get a palindrome (34266999966243).

The spelling of 22055354611221 in words is "twenty-two trillion, fifty-five billion, three hundred fifty-four million, six hundred eleven thousand, two hundred twenty-one".