21302421341 has 2 divisors, whose sum is σ = 21302421342. Its totient is φ = 21302421340.

The previous prime is 21302421289. The next prime is 21302421347. The reversal of 21302421341 is 14312420312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20802004441 + 500416900 = 144229^2 + 22370^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302421341 - 2³⁴ = 4122552157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302421347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651210670 + 10651210671.

It is an arithmetic number, because the mean of its divisors is an integer number (10651210671).

Almost surely, 2^21302421341 is an apocalyptic number.

It is an amenable number.

21302421341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302421341 is an equidigital number, since it uses as much as digits as its factorization.

21302421341 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21302421341 its reverse (14312420312), we get a palindrome (35614841653).

The spelling of 21302421341 in words is "twenty-one billion, three hundred two million, four hundred twenty-one thousand, three hundred forty-one".