21412122 has 16 divisors (see below), whose sum is σ = 43982112. Its totient is φ = 6944400.

The previous prime is 21412099. The next prime is 21412123. The reversal of 21412122 is 22121412.

It is not an unprimeable number, because it can be changed into a prime (21412123) 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, 48004 + ... + 48447.

It is an arithmetic number, because the mean of its divisors is an integer number (2748882).

Almost surely, 2^21412122 is an apocalyptic number.

21412122 is an abundant number, since it is smaller than the sum of its proper divisors (22569990).

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

21412122 is a wasteful number, since it uses less digits than its factorization.

21412122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96493.

The product of its digits is 64, while the sum is 15.

The square root of 21412122 is about 4627.3234164039. The cubic root of 21412122 is about 277.6855215882.

Adding to 21412122 its reverse (22121412), we get a palindrome (43533534).

The spelling of 21412122 in words is "twenty-one million, four hundred twelve thousand, one hundred twenty-two".