21002110210000 has 50 divisors (see below), whose sum is σ = 50848209053642. Its totient is φ = 8400844080000.

The previous prime is 21002110209989. The next prime is 21002110210063. The reversal of 21002110210000 is 1201120012.

It can be written as a sum of positive squares in 5 ways, for example, as 8749338053184 + 12252772156816 = 2957928^2 + 3500396^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1050095511 + ... + 1050115510.

Almost surely, 2^{21002110210000} is an apocalyptic number.

21002110210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002110210000 is an abundant number, since it is smaller than the sum of its proper divisors (29846098843642).

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

21002110210000 is an equidigital number, since it uses as much as digits as its factorization.

21002110210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100211049 (or 2100211028 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21002110210000 its reverse (1201120012), we get a palindrome (21003311330012).

The spelling of 21002110210000 in words is "twenty-one trillion, two billion, one hundred ten million, two hundred ten thousand".