21110012239 has 2 divisors, whose sum is σ = 21110012240. Its totient is φ = 21110012238.

The previous prime is 21110012197. The next prime is 21110012257. The reversal of 21110012239 is 93221001112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110012239 - 2¹⁹ = 21109487951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110012299) 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, 10555006119 + 10555006120.

It is an arithmetic number, because the mean of its divisors is an integer number (10555006120).

Almost surely, 2^21110012239 is an apocalyptic number.

21110012239 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110012239 is an equidigital number, since it uses as much as digits as its factorization.

21110012239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 21110012239 in words is "twenty-one billion, one hundred ten million, twelve thousand, two hundred thirty-nine".