21210110100002 has 8 divisors (see below), whose sum is σ = 32143156543596. Its totient is φ = 10495724585472.

The previous prime is 21210110100001. The next prime is 21210110100043. The reversal of 21210110100002 is 20000101101212.

It can be written as a sum of positive squares in 2 ways, for example, as 21186403031161 + 23707068841 = 4602869^2 + 153971^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21210110100001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54665232023 + ... + 54665232410.

Almost surely, 2^{21210110100002} is an apocalyptic number.

21210110100002 is a deficient number, since it is larger than the sum of its proper divisors (10933046443594).

21210110100002 is a wasteful number, since it uses less digits than its factorization.

21210110100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109330464532.

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

Adding to 21210110100002 its reverse (20000101101212), we get a palindrome (41210211201214).

The spelling of 21210110100002 in words is "twenty-one trillion, two hundred ten billion, one hundred ten million, one hundred thousand, two".