21344131279 has 2 divisors, whose sum is σ = 21344131280. Its totient is φ = 21344131278.

The previous prime is 21344131273. The next prime is 21344131301. The reversal of 21344131279 is 97213144312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21344131279 - 2¹⁵ = 21344098511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21344131273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672065639 + 10672065640.

It is an arithmetic number, because the mean of its divisors is an integer number (10672065640).

Almost surely, 2^21344131279 is an apocalyptic number.

21344131279 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344131279 is an equidigital number, since it uses as much as digits as its factorization.

21344131279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The spelling of 21344131279 in words is "twenty-one billion, three hundred forty-four million, one hundred thirty-one thousand, two hundred seventy-nine".