21422512420100 has 36 divisors (see below), whose sum is σ = 50712929404368. Its totient is φ = 7790004516000.

The previous prime is 21422512420093. The next prime is 21422512420217. The reversal of 21422512420100 is 102421522412.

It is a self number, because there is not a number n which added to its sum of digits gives 21422512420100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9737504546 + ... + 9737506745.

Almost surely, 2^{21422512420100} is an apocalyptic number.

21422512420100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21422512420100 is an abundant number, since it is smaller than the sum of its proper divisors (29290416984268).

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

21422512420100 is a wasteful number, since it uses less digits than its factorization.

21422512420100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19475011316 (or 19475011309 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 21422512420100 its reverse (102421522412), we get a palindrome (21524933942512).

The spelling of 21422512420100 in words is "twenty-one trillion, four hundred twenty-two billion, five hundred twelve million, four hundred twenty thousand, one hundred".