21010202110100 has 54 divisors (see below), whose sum is σ = 53035753053150. Its totient is φ = 7203497864640.

The previous prime is 21010202110081. The next prime is 21010202110133. The reversal of 21010202110100 is 101120201012.

It can be written as a sum of positive squares in 3 ways, for example, as 2570237414416 + 18439964695684 = 1603196^2 + 4294178^2 .

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 2143893275 + ... + 2143903074.

Almost surely, 2^{21010202110100} is an apocalyptic number.

21010202110100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010202110100 is an abundant number, since it is smaller than the sum of its proper divisors (32025550943050).

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

21010202110100 is a wasteful number, since it uses less digits than its factorization.

21010202110100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287796377 (or 4287796363 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21010202110100 its reverse (101120201012), we get a palindrome (21111322311112).

The spelling of 21010202110100 in words is "twenty-one trillion, ten billion, two hundred two million, one hundred ten thousand, one hundred".