21000100202210 has 8 divisors (see below), whose sum is σ = 37800180363996. Its totient is φ = 8400040080880.

The previous prime is 21000100202173. The next prime is 21000100202297. The reversal of 21000100202210 is 1220200100012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19064025540169 + 1936074662041 = 4366237^2 + 1391429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21000100202191 and 21000100202200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050005010101 + ... + 1050005010120.

Almost surely, 2^{21000100202210} is an apocalyptic number.

21000100202210 is a deficient number, since it is larger than the sum of its proper divisors (16800080161786).

21000100202210 is a wasteful number, since it uses less digits than its factorization.

21000100202210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100010020228.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21000100202210 its reverse (1220200100012), we get a palindrome (22220300302222).

The spelling of 21000100202210 in words is "twenty-one trillion, one hundred million, two hundred two thousand, two hundred ten".