21100202100102 has 16 divisors (see below), whose sum is σ = 42201102488112. Its totient is φ = 7033284318720.

The previous prime is 21100202100079. The next prime is 21100202100209. The reversal of 21100202100102 is 20100120200112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28702099 + ... + 29428062.

It is an arithmetic number, because the mean of its divisors is an integer number (2637568905507).

Almost surely, 2^{21100202100102} is an apocalyptic number.

21100202100102 is an abundant number, since it is smaller than the sum of its proper divisors (21100900388010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21100202100102 is a wasteful number, since it uses less digits than its factorization.

21100202100102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58190663.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21100202100102 its reverse (20100120200112), we get a palindrome (41200322300214).

It can be divided in two parts, 21100 and 202100102, that added together give a palindrome (202121202).

The spelling of 21100202100102 in words is "twenty-one trillion, one hundred billion, two hundred two million, one hundred thousand, one hundred two".