10421442324221 has 4 divisors (see below), whose sum is σ = 10421450410944. Its totient is φ = 10421434237500.

The previous prime is 10421442324149. The next prime is 10421442324247. The reversal of 10421442324221 is 12242324412401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10421442324221 - 2²⁶ = 10421375215357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10421442324281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1630235 + ... + 4847736.

It is an arithmetic number, because the mean of its divisors is an integer number (2605362602736).

Almost surely, 2^{10421442324221} is an apocalyptic number.

It is an amenable number.

10421442324221 is a deficient number, since it is larger than the sum of its proper divisors (8086723).

10421442324221 is an equidigital number, since it uses as much as digits as its factorization.

10421442324221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086722.

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 10421442324221 its reverse (12242324412401), we get a palindrome (22663766736622).

The spelling of 10421442324221 in words is "ten trillion, four hundred twenty-one billion, four hundred forty-two million, three hundred twenty-four thousand, two hundred twenty-one".