21100202201012 has 72 divisors (see below), whose sum is σ = 42725414313120. Its totient is φ = 9085814971200.

The previous prime is 21100202201011. The next prime is 21100202201051. The reversal of 21100202201012 is 21010220200112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100202201011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 326490062 + ... + 326554682.

Almost surely, 2^{21100202201012} is an apocalyptic number.

21100202201012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21100202201012 is an abundant number, since it is smaller than the sum of its proper divisors (21625212112108).

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

21100202201012 is a wasteful number, since it uses less digits than its factorization.

21100202201012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100173 (or 100160 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21100202201012 its reverse (21010220200112), we get a palindrome (42110422401124).

Subtracting from 21100202201012 its reverse (21010220200112), we obtain a square (89982000900 = 299970²).

The spelling of 21100202201012 in words is "twenty-one trillion, one hundred billion, two hundred two million, two hundred one thousand, twelve".