21101102003 has 16 divisors (see below), whose sum is σ = 22150195200. Its totient is φ = 20074498080.

The previous prime is 21101101997. The next prime is 21101102017. The reversal of 21101102003 is 30020110112.

It is a cyclic number.

It is not a de Polignac number, because 21101102003 - 2⁶ = 21101101939 is a prime.

It is a super-2 number, since 2×21101102003² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101102203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1143218 + ... + 1161528.

It is an arithmetic number, because the mean of its divisors is an integer number (1384387200).

Almost surely, 2^21101102003 is an apocalyptic number.

21101102003 is a deficient number, since it is larger than the sum of its proper divisors (1049093197).

21101102003 is a wasteful number, since it uses less digits than its factorization.

21101102003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18922.

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

Adding to 21101102003 its reverse (30020110112), we get a palindrome (51121212115).

The spelling of 21101102003 in words is "twenty-one billion, one hundred one million, one hundred two thousand, three".