21094103 has 2 divisors, whose sum is σ = 21094104. Its totient is φ = 21094102.

The previous prime is 21094097. The next prime is 21094109. The reversal of 21094103 is 30149012.

It is a balanced prime because it is at equal distance from previous prime (21094097) and next prime (21094109).

It is a cyclic number.

It is not a de Polignac number, because 21094103 - 2¹² = 21090007 is a prime.

It is a super-2 number, since 2×21094103² = 889922362749218, which contains 22 as substring.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21094109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10547051 + 10547052.

It is an arithmetic number, because the mean of its divisors is an integer number (10547052).

Almost surely, 2^21094103 is an apocalyptic number.

21094103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21094103 is an equidigital number, since it uses as much as digits as its factorization.

21094103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 21094103 is about 4592.8316973301. The cubic root of 21094103 is about 276.3039036791.

The spelling of 21094103 in words is "twenty-one million, ninety-four thousand, one hundred three".