912100099991 has 2 divisors, whose sum is σ = 912100099992. Its totient is φ = 912100099990.

The previous prime is 912100099987. The next prime is 912100100039. The reversal of 912100099991 is 199990001219.

It is a weak prime.

It is an emirp because it is prime and its reverse (199990001219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 912100099991 - 2² = 912100099987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (912100099291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456050049995 + 456050049996.

It is an arithmetic number, because the mean of its divisors is an integer number (456050049996).

Almost surely, 2^912100099991 is an apocalyptic number.

912100099991 is a deficient number, since it is larger than the sum of its proper divisors (1).

912100099991 is an equidigital number, since it uses as much as digits as its factorization.

912100099991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098, while the sum is 50.

The spelling of 912100099991 in words is "nine hundred twelve billion, one hundred million, ninety-nine thousand, nine hundred ninety-one".