1421341110221 has 4 divisors (see below), whose sum is σ = 1421861941500. Its totient is φ = 1420820278944.

The previous prime is 1421341110193. The next prime is 1421341110229. The reversal of 1421341110221 is 1220111431241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1387540287721 + 33800822500 = 1177939^2 + 183850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421341110221 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 (1421341110229) 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, 260411546 + ... + 260417003.

It is an arithmetic number, because the mean of its divisors is an integer number (355465485375).

Almost surely, 2^{1421341110221} is an apocalyptic number.

It is an amenable number.

1421341110221 is a deficient number, since it is larger than the sum of its proper divisors (520831279).

1421341110221 is an equidigital number, since it uses as much as digits as its factorization.

1421341110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520831278.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 1421341110221 its reverse (1220111431241), we get a palindrome (2641452541462).

The spelling of 1421341110221 in words is "one trillion, four hundred twenty-one billion, three hundred forty-one million, one hundred ten thousand, two hundred twenty-one".