22121322 has 16 divisors (see below), whose sum is σ = 44299872. Its totient is φ = 7364240.

The previous prime is 22121303. The next prime is 22121329. The reversal of 22121322 is 22312122.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (22121329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3928 + ... + 7724.

It is an arithmetic number, because the mean of its divisors is an integer number (2768742).

Almost surely, 2^22121322 is an apocalyptic number.

22121322 is an abundant number, since it is smaller than the sum of its proper divisors (22178550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121322 is a wasteful number, since it uses less digits than its factorization.

22121322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4773.

The product of its digits is 96, while the sum is 15.

The square root of 22121322 is about 4703.3309473181. The cubic root of 22121322 is about 280.7180634061.

Subtracting from 22121322 its product of digits (96), we obtain a triangular number (22121226 = T₆₆₅₁).

Adding to 22121322 its reverse (22312122), we get a palindrome (44433444).

The spelling of 22121322 in words is "twenty-two million, one hundred twenty-one thousand, three hundred twenty-two".