21202102120099 has 2 divisors, whose sum is σ = 21202102120100. Its totient is φ = 21202102120098.

The previous prime is 21202102120049. The next prime is 21202102120117. The reversal of 21202102120099 is 99002120120212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202102120099 - 2⁷ = 21202102119971 is a prime.

It is a super-2 number, since 2×21202102120099² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21202102120099.

It is not a weakly prime, because it can be changed into another prime (21202102120019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601051060049 + 10601051060050.

It is an arithmetic number, because the mean of its divisors is an integer number (10601051060050).

Almost surely, 2^{21202102120099} is an apocalyptic number.

21202102120099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202102120099 is an equidigital number, since it uses as much as digits as its factorization.

21202102120099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 21202102120099 in words is "twenty-one trillion, two hundred two billion, one hundred two million, one hundred twenty thousand, ninety-nine".