21202110201099 has 4 divisors (see below), whose sum is σ = 28269480268136. Its totient is φ = 14134740134064.

The previous prime is 21202110201067. The next prime is 21202110201113. The reversal of 21202110201099 is 99010201120212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21202110201099 - 2⁵ = 21202110201067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202110201049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3533685033514 + ... + 3533685033519.

It is an arithmetic number, because the mean of its divisors is an integer number (7067370067034).

Almost surely, 2^{21202110201099} is an apocalyptic number.

21202110201099 is a deficient number, since it is larger than the sum of its proper divisors (7067370067037).

21202110201099 is an equidigital number, since it uses as much as digits as its factorization.

21202110201099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067370067036.

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

The spelling of 21202110201099 in words is "twenty-one trillion, two hundred two billion, one hundred ten million, two hundred one thousand, ninety-nine".