22111321553 has 4 divisors (see below), whose sum is σ = 22111859520. Its totient is φ = 22110783588.

The previous prime is 22111321501. The next prime is 22111321579. The reversal of 22111321553 is 35512311122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35512311122 = 2 ⋅17756155561.

It is a cyclic number.

It is not a de Polignac number, because 22111321553 - 2¹⁰ = 22111320529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22111324553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201725 + ... + 291402.

It is an arithmetic number, because the mean of its divisors is an integer number (5527964880).

Almost surely, 2^22111321553 is an apocalyptic number.

It is an amenable number.

22111321553 is a deficient number, since it is larger than the sum of its proper divisors (537967).

22111321553 is an equidigital number, since it uses as much as digits as its factorization.

22111321553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537966.

The product of its digits is 1800, while the sum is 26.

Adding to 22111321553 its reverse (35512311122), we get a palindrome (57623632675).

The spelling of 22111321553 in words is "twenty-two billion, one hundred eleven million, three hundred twenty-one thousand, five hundred fifty-three".