21210120121199 has 16 divisors (see below), whose sum is σ = 21783458632320. Its totient is φ = 20643837046560.

The previous prime is 21210120121193. The next prime is 21210120121297. The reversal of 21210120121199 is 99112102101212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210120121199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210120121193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344192 + ... + 6522170.

It is an arithmetic number, because the mean of its divisors is an integer number (1361466164520).

Almost surely, 2^{21210120121199} is an apocalyptic number.

21210120121199 is a deficient number, since it is larger than the sum of its proper divisors (573338511121).

21210120121199 is a wasteful number, since it uses less digits than its factorization.

21210120121199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6178550.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 21210120121199 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty million, one hundred twenty-one thousand, one hundred ninety-nine".