21412421010 has 64 divisors (see below), whose sum is σ = 58067625600. Its totient is φ = 5613195456.

The previous prime is 21412420999. The next prime is 21412421047. The reversal of 21412421010 is 1012421412.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 656149 + ... + 688008.

It is an arithmetic number, because the mean of its divisors is an integer number (907306650).

Almost surely, 2^21412421010 is an apocalyptic number.

21412421010 is an abundant number, since it is smaller than the sum of its proper divisors (36655204590).

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

21412421010 is a wasteful number, since it uses less digits than its factorization.

21412421010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344232 (or 1344226 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21412421010 its reverse (1012421412), we get a palindrome (22424842422).

The spelling of 21412421010 in words is "twenty-one billion, four hundred twelve million, four hundred twenty-one thousand, ten".