22111221544 has 16 divisors (see below), whose sum is σ = 42077325600. Its totient is φ = 10890601392.

The previous prime is 22111221529. The next prime is 22111221563. The reversal of 22111221544 is 44512211122.

It is a super-2 number, since 2×22111221544² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20625604 + ... + 20626675.

It is an arithmetic number, because the mean of its divisors is an integer number (2629832850).

Almost surely, 2^22111221544 is an apocalyptic number.

It is an amenable number.

22111221544 is a deficient number, since it is larger than the sum of its proper divisors (19966104056).

22111221544 is a wasteful number, since it uses less digits than its factorization.

22111221544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41252352 (or 41252348 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

Adding to 22111221544 its reverse (44512211122), we get a palindrome (66623432666).

The spelling of 22111221544 in words is "twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, five hundred forty-four".