21210120102099 has 8 divisors (see below), whose sum is σ = 28422271494400. Its totient is φ = 14069024388936.

The previous prime is 21210120102071. The next prime is 21210120102151. The reversal of 21210120102099 is 99020102101212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21210120102099 - 2⁹ = 21210120101587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210120102019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17763919087 + ... + 17763920280.

It is an arithmetic number, because the mean of its divisors is an integer number (3552783936800).

Almost surely, 2^{21210120102099} is an apocalyptic number.

21210120102099 is a deficient number, since it is larger than the sum of its proper divisors (7212151392301).

21210120102099 is a wasteful number, since it uses less digits than its factorization.

21210120102099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35527839569.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 21210120102099 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty million, one hundred two thousand, ninety-nine".