21201112003 has 2 divisors, whose sum is σ = 21201112004. Its totient is φ = 21201112002.

The previous prime is 21201111991. The next prime is 21201112027. The reversal of 21201112003 is 30021110212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201112003 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201112033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600556001 + 10600556002.

It is an arithmetic number, because the mean of its divisors is an integer number (10600556002).

Almost surely, 2^21201112003 is an apocalyptic number.

21201112003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201112003 is an equidigital number, since it uses as much as digits as its factorization.

21201112003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21201112003 its reverse (30021110212), we get a palindrome (51222222215).

The spelling of 21201112003 in words is "twenty-one billion, two hundred one million, one hundred twelve thousand, three".