21422242120 has 32 divisors (see below), whose sum is σ = 48878925120. Its totient is φ = 8448207040.

The previous prime is 21422242063. The next prime is 21422242157. The reversal of 21422242120 is 2124222412.

It is a junction number, because it is equal to n+sod(n) for n = 21422242091 and 21422242100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3768682 + ... + 3774361.

It is an arithmetic number, because the mean of its divisors is an integer number (1527466410).

Almost surely, 2^21422242120 is an apocalyptic number.

21422242120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21422242120 is an abundant number, since it is smaller than the sum of its proper divisors (27456683000).

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

21422242120 is a wasteful number, since it uses less digits than its factorization.

21422242120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7543125 (or 7543121 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21422242120 its reverse (2124222412), we get a palindrome (23546464532).

The spelling of 21422242120 in words is "twenty-one billion, four hundred twenty-two million, two hundred forty-two thousand, one hundred twenty".