21142111103 has 2 divisors, whose sum is σ = 21142111104. Its totient is φ = 21142111102.

The previous prime is 21142111093. The next prime is 21142111157. The reversal of 21142111103 is 30111124112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21142111103 - 2¹⁶ = 21142045567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21142117103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571055551 + 10571055552.

It is an arithmetic number, because the mean of its divisors is an integer number (10571055552).

Almost surely, 2^21142111103 is an apocalyptic number.

21142111103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142111103 is an equidigital number, since it uses as much as digits as its factorization.

21142111103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21142111103 its reverse (30111124112), we get a palindrome (51253235215).

The spelling of 21142111103 in words is "twenty-one billion, one hundred forty-two million, one hundred eleven thousand, one hundred three".