21210100000003 has 4 divisors (see below), whose sum is σ = 21220647043288. Its totient is φ = 21199552956720.

The previous prime is 21210099999971. The next prime is 21210100000093. The reversal of 21210100000003 is 30000000101212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21210100000003 - 2⁵ = 21210099999971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210100000093) 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, 5273518626 + ... + 5273522647.

It is an arithmetic number, because the mean of its divisors is an integer number (5305161760822).

Almost surely, 2^{21210100000003} is an apocalyptic number.

21210100000003 is a deficient number, since it is larger than the sum of its proper divisors (10547043285).

21210100000003 is a wasteful number, since it uses less digits than its factorization.

21210100000003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10547043284.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21210100000003 its reverse (30000000101212), we get a palindrome (51210100101215).

The spelling of 21210100000003 in words is "twenty-one trillion, two hundred ten billion, one hundred million, three", and thus it is an aban number.