12120301201991 has 2 divisors, whose sum is σ = 12120301201992. Its totient is φ = 12120301201990.

The previous prime is 12120301201979. The next prime is 12120301202083. The reversal of 12120301201991 is 19910210302121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120301201991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12120301203991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060150600995 + 6060150600996.

It is an arithmetic number, because the mean of its divisors is an integer number (6060150600996).

Almost surely, 2^{12120301201991} is an apocalyptic number.

12120301201991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120301201991 is an equidigital number, since it uses as much as digits as its factorization.

12120301201991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 12120301201991 in words is "twelve trillion, one hundred twenty billion, three hundred one million, two hundred one thousand, nine hundred ninety-one".