21122922 has 8 divisors (see below), whose sum is σ = 42245856. Its totient is φ = 7040972.

The previous prime is 21122921. The next prime is 21122923. The reversal of 21122922 is 22922112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21122921) and next prime (21122923).

It is a sphenic number, since it is the product of 3 distinct primes.

21122922 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21122921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760238 + ... + 1760249.

It is an arithmetic number, because the mean of its divisors is an integer number (5280732).

Almost surely, 2^21122922 is an apocalyptic number.

21122922 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21122922 is a wasteful number, since it uses less digits than its factorization.

21122922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3520492.

The product of its digits is 288, while the sum is 21.

The square root of 21122922 is about 4595.9680155545. The cubic root of 21122922 is about 276.4296762494.

The spelling of 21122922 in words is "twenty-one million, one hundred twenty-two thousand, nine hundred twenty-two".