12101120100991 has 2 divisors, whose sum is σ = 12101120100992. Its totient is φ = 12101120100990.

The previous prime is 12101120100943. The next prime is 12101120100997. The reversal of 12101120100991 is 19900102110121.

It is a happy number.

12101120100991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12101120100991 - 2¹¹ = 12101120098943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12101120100997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050560050495 + 6050560050496.

It is an arithmetic number, because the mean of its divisors is an integer number (6050560050496).

Almost surely, 2^{12101120100991} is an apocalyptic number.

12101120100991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101120100991 is an equidigital number, since it uses as much as digits as its factorization.

12101120100991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 12101120100991 in words is "twelve trillion, one hundred one billion, one hundred twenty million, one hundred thousand, nine hundred ninety-one".