21130108339 has 2 divisors, whose sum is σ = 21130108340. Its totient is φ = 21130108338.

The previous prime is 21130108313. The next prime is 21130108357. The reversal of 21130108339 is 93380103112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21130108339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21130108339.

It is not a weakly prime, because it can be changed into another prime (21130138339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565054169 + 10565054170.

It is an arithmetic number, because the mean of its divisors is an integer number (10565054170).

Almost surely, 2^21130108339 is an apocalyptic number.

21130108339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130108339 is an equidigital number, since it uses as much as digits as its factorization.

21130108339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 21130108339 in words is "twenty-one billion, one hundred thirty million, one hundred eight thousand, three hundred thirty-nine".