21101120111003 has 12 divisors (see below), whose sum is σ = 21477283725240. Its totient is φ = 20731331551392.

The previous prime is 21101120110969. The next prime is 21101120111011. The reversal of 21101120111003 is 30011102110112.

It is a de Polignac number, because none of the positive numbers 2^k-21101120111003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101120111033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4500026 + ... + 7902687.

It is an arithmetic number, because the mean of its divisors is an integer number (1789773643770).

Almost surely, 2^{21101120111003} is an apocalyptic number.

21101120111003 is a deficient number, since it is larger than the sum of its proper divisors (376163614237).

21101120111003 is an equidigital number, since it uses as much as digits as its factorization.

21101120111003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12403226 (or 12403159 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 21101120111003 its reverse (30011102110112), we get a palindrome (51112222221115).

The spelling of 21101120111003 in words is "twenty-one trillion, one hundred one billion, one hundred twenty million, one hundred eleven thousand, three".