21030312200999 has 2 divisors, whose sum is σ = 21030312201000. Its totient is φ = 21030312200998.

The previous prime is 21030312200983. The next prime is 21030312201079. The reversal of 21030312200999 is 99900221303012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21030312200999 - 2⁴ = 21030312200983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21030312200959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515156100499 + 10515156100500.

It is an arithmetic number, because the mean of its divisors is an integer number (10515156100500).

Almost surely, 2^{21030312200999} is an apocalyptic number.

21030312200999 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030312200999 is an equidigital number, since it uses as much as digits as its factorization.

21030312200999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 41.

The spelling of 21030312200999 in words is "twenty-one trillion, thirty billion, three hundred twelve million, two hundred thousand, nine hundred ninety-nine".