21100010003 has 8 divisors (see below), whose sum is σ = 22350954672. Its totient is φ = 19850150656.

The previous prime is 21100009981. The next prime is 21100010027. The reversal of 21100010003 is 30001000112.

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

It is a cyclic number.

It is not a de Polignac number, because 21100010003 - 2⁶ = 21100009939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100010083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231125 + ... + 309222.

It is an arithmetic number, because the mean of its divisors is an integer number (2793869334).

Almost surely, 2^21100010003 is an apocalyptic number.

21100010003 is a deficient number, since it is larger than the sum of its proper divisors (1250944669).

21100010003 is a wasteful number, since it uses less digits than its factorization.

21100010003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542661.

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 21100010003 its reverse (30001000112), we get a palindrome (51101010115).

The spelling of 21100010003 in words is "twenty-one billion, one hundred million, ten thousand, three".