21322122 has 16 divisors (see below), whose sum is σ = 42884640. Its totient is φ = 7067312.

The previous prime is 21322117. The next prime is 21322129. The reversal of 21322122 is 22122312.

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 (21322129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8853 + ... + 11000.

It is an arithmetic number, because the mean of its divisors is an integer number (2680290).

Almost surely, 2^21322122 is an apocalyptic number.

21322122 is an abundant number, since it is smaller than the sum of its proper divisors (21562518).

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

21322122 is a wasteful number, since it uses less digits than its factorization.

21322122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20037.

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

The square root of 21322122 is about 4617.5883315861. The cubic root of 21322122 is about 277.2959168246.

Adding to 21322122 its reverse (22122312), we get a palindrome (43444434).

The spelling of 21322122 in words is "twenty-one million, three hundred twenty-two thousand, one hundred twenty-two".