12100121993 has 2 divisors, whose sum is σ = 12100121994. Its totient is φ = 12100121992.

The previous prime is 12100121981. The next prime is 12100122053. The reversal of 12100121993 is 39912100121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8417695504 + 3682426489 = 91748^2 + 60683^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100121993 - 2²² = 12095927689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12100121393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050060996 + 6050060997.

It is an arithmetic number, because the mean of its divisors is an integer number (6050060997).

Almost surely, 2^12100121993 is an apocalyptic number.

It is an amenable number.

12100121993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100121993 is an equidigital number, since it uses as much as digits as its factorization.

12100121993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 12100121993 in words is "twelve billion, one hundred million, one hundred twenty-one thousand, nine hundred ninety-three".