21120003103 has 8 divisors (see below), whose sum is σ = 21413471168. Its totient is φ = 20826647424.

The previous prime is 21120003097. The next prime is 21120003119. The reversal of 21120003103 is 30130002112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120003103 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 (21120003403) 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, 394051 + ... + 444427.

It is an arithmetic number, because the mean of its divisors is an integer number (2676683896).

Almost surely, 2^21120003103 is an apocalyptic number.

21120003103 is a deficient number, since it is larger than the sum of its proper divisors (293468065).

21120003103 is an equidigital number, since it uses as much as digits as its factorization.

21120003103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56193.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21120003103 its reverse (30130002112), we get a palindrome (51250005215).

Subtracting 21120003103 from its reverse (30130002112), we obtain a palindrome (9009999009).

The spelling of 21120003103 in words is "twenty-one billion, one hundred twenty million, three thousand, one hundred three".