21412421323 has 2 divisors, whose sum is σ = 21412421324. Its totient is φ = 21412421322.

The previous prime is 21412421321. The next prime is 21412421377. The reversal of 21412421323 is 32312421412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21412421323 - 2¹ = 21412421321 is a prime.

Together with 21412421321, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21412421321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706210661 + 10706210662.

It is an arithmetic number, because the mean of its divisors is an integer number (10706210662).

Almost surely, 2^21412421323 is an apocalyptic number.

21412421323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21412421323 is an equidigital number, since it uses as much as digits as its factorization.

21412421323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

Adding to 21412421323 its reverse (32312421412), we get a palindrome (53724842735).

The spelling of 21412421323 in words is "twenty-one billion, four hundred twelve million, four hundred twenty-one thousand, three hundred twenty-three".