21131330039 has 2 divisors, whose sum is σ = 21131330040. Its totient is φ = 21131330038.

The previous prime is 21131330029. The next prime is 21131330041. The reversal of 21131330039 is 93003313112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21131330039 is a prime.

Together with 21131330041, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21131330029) 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, 10565665019 + 10565665020.

It is an arithmetic number, because the mean of its divisors is an integer number (10565665020).

Almost surely, 2^21131330039 is an apocalyptic number.

21131330039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21131330039 is an equidigital number, since it uses as much as digits as its factorization.

21131330039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 26.

The spelling of 21131330039 in words is "twenty-one billion, one hundred thirty-one million, three hundred thirty thousand, thirty-nine".