21122322 has 16 divisors (see below), whose sum is σ = 45494400. Its totient is φ = 6499152.

The previous prime is 21122291. The next prime is 21122323. The reversal of 21122322 is 22322112.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (21122323) 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, 135322 + ... + 135477.

It is an arithmetic number, because the mean of its divisors is an integer number (2843400).

Almost surely, 2^21122322 is an apocalyptic number.

21122322 is an abundant number, since it is smaller than the sum of its proper divisors (24372078).

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

21122322 is a wasteful number, since it uses less digits than its factorization.

21122322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270817.

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

The square root of 21122322 is about 4595.9027404853. The cubic root of 21122322 is about 276.4270588815.

Adding to 21122322 its reverse (22322112), we get a palindrome (43444434).

The spelling of 21122322 in words is "twenty-one million, one hundred twenty-two thousand, three hundred twenty-two".