21100323239 has 2 divisors, whose sum is σ = 21100323240. Its totient is φ = 21100323238.

The previous prime is 21100323203. The next prime is 21100323253. The reversal of 21100323239 is 93232300112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21100323239 - 2²⁰ = 21099274663 is a prime.

It is a super-2 number, since 2×21100323239² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100323269) 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, 10550161619 + 10550161620.

It is an arithmetic number, because the mean of its divisors is an integer number (10550161620).

Almost surely, 2^21100323239 is an apocalyptic number.

21100323239 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100323239 is an equidigital number, since it uses as much as digits as its factorization.

21100323239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 21100323239 in words is "twenty-one billion, one hundred million, three hundred twenty-three thousand, two hundred thirty-nine".