12102091 has 2 divisors, whose sum is σ = 12102092. Its totient is φ = 12102090.

The previous prime is 12102067. The next prime is 12102127. The reversal of 12102091 is 19020121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12102091 - 2¹⁹ = 11577803 is a prime.

It is not a weakly prime, because it can be changed into another prime (12102001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051045 + 6051046.

It is an arithmetic number, because the mean of its divisors is an integer number (6051046).

Almost surely, 2^12102091 is an apocalyptic number.

12102091 is the 1860-th centered heptagonal number.

12102091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102091 is an equidigital number, since it uses as much as digits as its factorization.

12102091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 12102091 is about 3478.8059733190. The cubic root of 12102091 is about 229.5902661014.

The spelling of 12102091 in words is "twelve million, one hundred two thousand, ninety-one".