12120111012091 has 2 divisors, whose sum is σ = 12120111012092. Its totient is φ = 12120111012090.

The previous prime is 12120111012083. The next prime is 12120111012173. The reversal of 12120111012091 is 19021011102121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12120111012091 - 2³ = 12120111012083 is a prime.

It is not a weakly prime, because it can be changed into another prime (12120111012071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060055506045 + 6060055506046.

It is an arithmetic number, because the mean of its divisors is an integer number (6060055506046).

Almost surely, 2^{12120111012091} is an apocalyptic number.

12120111012091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120111012091 is an equidigital number, since it uses as much as digits as its factorization.

12120111012091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 12120111012091 in words is "twelve trillion, one hundred twenty billion, one hundred eleven million, twelve thousand, ninety-one".