21210100421299 has 2 divisors, whose sum is σ = 21210100421300. Its totient is φ = 21210100421298.

The previous prime is 21210100421287. The next prime is 21210100421357. The reversal of 21210100421299 is 99212400101212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21210100421299 - 2⁵ = 21210100421267 is a prime.

It is not a weakly prime, because it can be changed into another prime (21210100421399) 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, 10605050210649 + 10605050210650.

It is an arithmetic number, because the mean of its divisors is an integer number (10605050210650).

Almost surely, 2^{21210100421299} is an apocalyptic number.

21210100421299 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210100421299 is an equidigital number, since it uses as much as digits as its factorization.

21210100421299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 21210100421299 in words is "twenty-one trillion, two hundred ten billion, one hundred million, four hundred twenty-one thousand, two hundred ninety-nine".