21300310139 has 2 divisors, whose sum is σ = 21300310140. Its totient is φ = 21300310138.

The previous prime is 21300310027. The next prime is 21300310151. The reversal of 21300310139 is 93101300312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21300310139 - 2²⁴ = 21283532923 is a prime.

It is not a weakly prime, because it can be changed into another prime (21300312139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650155069 + 10650155070.

It is an arithmetic number, because the mean of its divisors is an integer number (10650155070).

Almost surely, 2^21300310139 is an apocalyptic number.

21300310139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300310139 is an equidigital number, since it uses as much as digits as its factorization.

21300310139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The spelling of 21300310139 in words is "twenty-one billion, three hundred million, three hundred ten thousand, one hundred thirty-nine".