21100202101101 has 4 divisors (see below), whose sum is σ = 28133602801472. Its totient is φ = 14066801400732.

The previous prime is 21100202101067. The next prime is 21100202101193. The reversal of 21100202101101 is 10110120200112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21100202101101 - 2¹⁰ = 21100202100077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100202101201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3516700350181 + ... + 3516700350186.

It is an arithmetic number, because the mean of its divisors is an integer number (7033400700368).

Almost surely, 2^{21100202101101} is an apocalyptic number.

It is an amenable number.

21100202101101 is a deficient number, since it is larger than the sum of its proper divisors (7033400700371).

21100202101101 is an equidigital number, since it uses as much as digits as its factorization.

21100202101101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7033400700370.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21100202101101 its reverse (10110120200112), we get a palindrome (31210322301213).

The spelling of 21100202101101 in words is "twenty-one trillion, one hundred billion, two hundred two million, one hundred one thousand, one hundred one".