21200111003 has 2 divisors, whose sum is σ = 21200111004. Its totient is φ = 21200111002.

The previous prime is 21200110963. The next prime is 21200111017. The reversal of 21200111003 is 30011100212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21200111003 - 2¹⁶ = 21200045467 is a prime.

It is not a weakly prime, because it can be changed into another prime (21200111503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600055501 + 10600055502.

It is an arithmetic number, because the mean of its divisors is an integer number (10600055502).

Almost surely, 2^21200111003 is an apocalyptic number.

21200111003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200111003 is an equidigital number, since it uses as much as digits as its factorization.

21200111003 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21200111003 its reverse (30011100212), we get a palindrome (51211211215).

The spelling of 21200111003 in words is "twenty-one billion, two hundred million, one hundred eleven thousand, three".