21112322 has 40 divisors (see below), whose sum is σ = 40198080. Its totient is φ = 8145720.

The previous prime is 21112291. The next prime is 21112339. The reversal of 21112322 is 22321112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21112297 and 21112306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 204923 + ... + 205025.

It is an arithmetic number, because the mean of its divisors is an integer number (1004952).

Almost surely, 2^21112322 is an apocalyptic number.

21112322 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21112322 is a deficient number, since it is larger than the sum of its proper divisors (19085758).

21112322 is an equidigital number, since it uses as much as digits as its factorization.

21112322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 123 counting only the distinct ones).

The product of its digits is 48, while the sum is 14.

The square root of 21112322 is about 4594.8146861435. The cubic root of 21112322 is about 276.3834287835.

Adding to 21112322 its reverse (22321112), we get a palindrome (43433434).

The spelling of 21112322 in words is "twenty-one million, one hundred twelve thousand, three hundred twenty-two".