21200200139 has 2 divisors, whose sum is σ = 21200200140. Its totient is φ = 21200200138.

The previous prime is 21200200111. The next prime is 21200200169. The reversal of 21200200139 is 93100200212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21200200139 - 2²⁰ = 21199151563 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21200200139.

It is not a weakly prime, because it can be changed into another prime (21200200169) 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, 10600100069 + 10600100070.

It is an arithmetic number, because the mean of its divisors is an integer number (10600100070).

Almost surely, 2^21200200139 is an apocalyptic number.

21200200139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200200139 is an equidigital number, since it uses as much as digits as its factorization.

21200200139 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 20.

The spelling of 21200200139 in words is "twenty-one billion, two hundred million, two hundred thousand, one hundred thirty-nine".