421341302021 has 4 divisors (see below), whose sum is σ = 421384345344. Its totient is φ = 421298258700.

The previous prime is 421341301967. The next prime is 421341302047. The reversal of 421341302021 is 120203143124.

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.

It is a cyclic number.

It is not a de Polignac number, because 421341302021 - 2¹⁴ = 421341285637 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 (421343302021) 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, 21506975 + ... + 21526556.

It is an arithmetic number, because the mean of its divisors is an integer number (105346086336).

Almost surely, 2^421341302021 is an apocalyptic number.

It is an amenable number.

421341302021 is a deficient number, since it is larger than the sum of its proper divisors (43043323).

421341302021 is an equidigital number, since it uses as much as digits as its factorization.

421341302021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43043322.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 421341302021 its reverse (120203143124), we get a palindrome (541544445145).

The spelling of 421341302021 in words is "four hundred twenty-one billion, three hundred forty-one million, three hundred two thousand, twenty-one".