21020110010099 has 2 divisors, whose sum is σ = 21020110010100. Its totient is φ = 21020110010098.

The previous prime is 21020110010083. The next prime is 21020110010171. The reversal of 21020110010099 is 99001001102012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21020110010099 - 2⁴ = 21020110010083 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21020110010059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510055005049 + 10510055005050.

It is an arithmetic number, because the mean of its divisors is an integer number (10510055005050).

Almost surely, 2^{21020110010099} is an apocalyptic number.

21020110010099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020110010099 is an equidigital number, since it uses as much as digits as its factorization.

21020110010099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 21020110010099 in words is "twenty-one trillion, twenty billion, one hundred ten million, ten thousand, ninety-nine".