12120091 has 2 divisors, whose sum is σ = 12120092. Its totient is φ = 12120090.

The previous prime is 12120089. The next prime is 12120179. The reversal of 12120091 is 19002121.

12120091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12120091 - 2¹ = 12120089 is a prime.

Together with 12120089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12120001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060045 + 6060046.

It is an arithmetic number, because the mean of its divisors is an integer number (6060046).

Almost surely, 2^12120091 is an apocalyptic number.

12120091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120091 is an equidigital number, since it uses as much as digits as its factorization.

12120091 is an evil number, because the sum of its binary digits is even.

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

The square root of 12120091 is about 3481.3921066148. The cubic root of 12120091 is about 229.7040364573.

The spelling of 12120091 in words is "twelve million, one hundred twenty thousand, ninety-one".