21410110421 has 32 divisors (see below), whose sum is σ = 26005132800. Its totient is φ = 17603308800.

The previous prime is 21410110399. The next prime is 21410110427. The reversal of 21410110421 is 12401101412.

It is a de Polignac number, because none of the positive numbers 2^k-21410110421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21410110421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410110427) by changing a digit.

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, 889181 + ... + 912941.

It is an arithmetic number, because the mean of its divisors is an integer number (812660400).

Almost surely, 2^21410110421 is an apocalyptic number.

It is an amenable number.

21410110421 is a deficient number, since it is larger than the sum of its proper divisors (4595022379).

21410110421 is an equidigital number, since it uses as much as digits as its factorization.

21410110421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23890 (or 23876 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21410110421 its reverse (12401101412), we get a palindrome (33811211833).

Subtracting from 21410110421 its reverse (12401101412), we obtain a palindrome (9009009009).

The spelling of 21410110421 in words is "twenty-one billion, four hundred ten million, one hundred ten thousand, four hundred twenty-one".