21113022 has 32 divisors (see below), whose sum is σ = 49248000. Its totient is φ = 6031704.

The previous prime is 21113017. The next prime is 21113023. The reversal of 21113022 is 22031112.

It is a junction number, because it is equal to n+sod(n) for n = 21112989 and 21113007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113023) 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 15 ways as a sum of consecutive naturals, for example, 3072 + ... + 7187.

It is an arithmetic number, because the mean of its divisors is an integer number (1539000).

Almost surely, 2^21113022 is an apocalyptic number.

21113022 is an abundant number, since it is smaller than the sum of its proper divisors (28134978).

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

21113022 is a wasteful number, since it uses less digits than its factorization.

21113022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10285 (or 10271 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21113022 is about 4594.8908583339. The cubic root of 21113022 is about 276.3864833387.

Adding to 21113022 its reverse (22031112), we get a palindrome (43144134).

The spelling of 21113022 in words is "twenty-one million, one hundred thirteen thousand, twenty-two".