21101100020202 has 16 divisors (see below), whose sum is σ = 43342800041952. Its totient is φ = 6843600006480.

The previous prime is 21101100020149. The next prime is 21101100020227. The reversal of 21101100020202 is 20202000110112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47524999824 + ... + 47525000267.

It is an arithmetic number, because the mean of its divisors is an integer number (2708925002622).

Almost surely, 2^{21101100020202} is an apocalyptic number.

21101100020202 is an abundant number, since it is smaller than the sum of its proper divisors (22241700021750).

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

21101100020202 is a wasteful number, since it uses less digits than its factorization.

21101100020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95050000133.

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

Adding to 21101100020202 its reverse (20202000110112), we get a palindrome (41303100130314).

The spelling of 21101100020202 in words is "twenty-one trillion, one hundred one billion, one hundred million, twenty thousand, two hundred two".