21100002103 has 2 divisors, whose sum is σ = 21100002104. Its totient is φ = 21100002102.

The previous prime is 21100002083. The next prime is 21100002107. The reversal of 21100002103 is 30120000112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21100002103 - 2¹³ = 21099993911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21100002103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100002107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550001051 + 10550001052.

It is an arithmetic number, because the mean of its divisors is an integer number (10550001052).

Almost surely, 2^21100002103 is an apocalyptic number.

21100002103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100002103 is an equidigital number, since it uses as much as digits as its factorization.

21100002103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21100002103 its reverse (30120000112), we get a palindrome (51220002215).

The spelling of 21100002103 in words is "twenty-one billion, one hundred million, two thousand, one hundred three".