21010010020103 has 32 divisors (see below), whose sum is σ = 25333094932992. Its totient is φ = 17233397452800.

The previous prime is 21010010020057. The next prime is 21010010020123. The reversal of 21010010020103 is 30102001001012.

It is a cyclic number.

It is not a de Polignac number, because 21010010020103 - 2⁸ = 21010010019847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010010020123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37117976 + ... + 37679757.

It is an arithmetic number, because the mean of its divisors is an integer number (791659216656).

Almost surely, 2^{21010010020103} is an apocalyptic number.

21010010020103 is a deficient number, since it is larger than the sum of its proper divisors (4323084912889).

21010010020103 is a wasteful number, since it uses less digits than its factorization.

21010010020103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74797835.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21010010020103 its reverse (30102001001012), we get a palindrome (51112011021115).

The spelling of 21010010020103 in words is "twenty-one trillion, ten billion, ten million, twenty thousand, one hundred three".