12300111991 has 2 divisors, whose sum is σ = 12300111992. Its totient is φ = 12300111990.

The previous prime is 12300111979. The next prime is 12300112001. The reversal of 12300111991 is 19911100321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12300111991 is a prime.

It is a super-2 number, since 2×12300111991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12300111091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6150055995 + 6150055996.

It is an arithmetic number, because the mean of its divisors is an integer number (6150055996).

Almost surely, 2^12300111991 is an apocalyptic number.

12300111991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12300111991 is an equidigital number, since it uses as much as digits as its factorization.

12300111991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 28.

The spelling of 12300111991 in words is "twelve billion, three hundred million, one hundred eleven thousand, nine hundred ninety-one".