22221412221 has 16 divisors (see below), whose sum is σ = 30340742400. Its totient is φ = 14462393088.

The previous prime is 22221412207. The next prime is 22221412229. The reversal of 22221412221 is 12221412222.

It is not a de Polignac number, because 22221412221 - 2¹⁷ = 22221281149 is a prime.

It is a super-2 number, since 2×22221412221² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221412229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505656 + ... + 547841.

It is an arithmetic number, because the mean of its divisors is an integer number (1896296400).

Almost surely, 2^22221412221 is an apocalyptic number.

It is an amenable number.

22221412221 is a deficient number, since it is larger than the sum of its proper divisors (8119330179).

22221412221 is a wasteful number, since it uses less digits than its factorization.

22221412221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053668.

The product of its digits is 512, while the sum is 21.

Adding to 22221412221 its reverse (12221412222), we get a palindrome (34442824443).

Subtracting from 22221412221 its reverse (12221412222), we obtain a palindrome (9999999999).

The spelling of 22221412221 in words is "twenty-two billion, two hundred twenty-one million, four hundred twelve thousand, two hundred twenty-one".