12111022091 has 8 divisors (see below), whose sum is σ = 13845208800. Its totient is φ = 10377845568.

The previous prime is 12111022069. The next prime is 12111022127. The reversal of 12111022091 is 19022011121.

12111022091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12111022091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111022691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226676 + ... + 274961.

It is an arithmetic number, because the mean of its divisors is an integer number (1730651100).

Almost surely, 2^12111022091 is an apocalyptic number.

12111022091 is a deficient number, since it is larger than the sum of its proper divisors (1734186709).

12111022091 is an equidigital number, since it uses as much as digits as its factorization.

12111022091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505093.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 12111022091 in words is "twelve billion, one hundred eleven million, twenty-two thousand, ninety-one".