21010001100100 has 36 divisors (see below), whose sum is σ = 47573950322304. Its totient is φ = 8038609115680.

The previous prime is 21010001100073. The next prime is 21010001100131. The reversal of 21010001100100 is 100110001012.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4567389244 + ... + 4567393843.

It is an arithmetic number, because the mean of its divisors is an integer number (1321498620064).

Almost surely, 2^{21010001100100} is an apocalyptic number.

21010001100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010001100100 is an abundant number, since it is smaller than the sum of its proper divisors (26563949222204).

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

21010001100100 is a wasteful number, since it uses less digits than its factorization.

21010001100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134783124 (or 9134783117 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 21010001100100 its reverse (100110001012), we get a palindrome (21110111101112).

The spelling of 21010001100100 in words is "twenty-one trillion, ten billion, one million, one hundred thousand, one hundred".