21211000103 has 2 divisors, whose sum is σ = 21211000104. Its totient is φ = 21211000102.

The previous prime is 21211000087. The next prime is 21211000117. The reversal of 21211000103 is 30100011212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21211000103 - 2⁴ = 21211000087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211000183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605500051 + 10605500052.

It is an arithmetic number, because the mean of its divisors is an integer number (10605500052).

Almost surely, 2^21211000103 is an apocalyptic number.

21211000103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211000103 is an equidigital number, since it uses as much as digits as its factorization.

21211000103 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 11.

Adding to 21211000103 its reverse (30100011212), we get a palindrome (51311011315).

The spelling of 21211000103 in words is "twenty-one billion, two hundred eleven million, one hundred three", and thus it is an aban number.