2121736579 has 2 divisors, whose sum is σ = 2121736580. Its totient is φ = 2121736578.

The previous prime is 2121736577. The next prime is 2121736613. The reversal of 2121736579 is 9756371212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121736579 - 2¹ = 2121736577 is a prime.

It is a super-2 number, since 2×2121736579² = 9003532221333246482, which contains 22 as substring.

Together with 2121736577, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2121736577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060868289 + 1060868290.

It is an arithmetic number, because the mean of its divisors is an integer number (1060868290).

Almost surely, 2^2121736579 is an apocalyptic number.

2121736579 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121736579 is an equidigital number, since it uses as much as digits as its factorization.

2121736579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 43.

The square root of 2121736579 is about 46062.3119154912. The cubic root of 2121736579 is about 1284.9823268171.

The spelling of 2121736579 in words is "two billion, one hundred twenty-one million, seven hundred thirty-six thousand, five hundred seventy-nine".