12100999 has 4 divisors (see below), whose sum is σ = 12128400. Its totient is φ = 12073600.

The previous prime is 12100993. The next prime is 12101003. The reversal of 12100999 is 99900121.

12100999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99900121 = 463 ⋅215767.

It is a cyclic number.

It is not a de Polignac number, because 12100999 - 2⁷ = 12100871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12100999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13027 + ... + 13924.

It is an arithmetic number, because the mean of its divisors is an integer number (3032100).

Almost surely, 2^12100999 is an apocalyptic number.

12100999 is a deficient number, since it is larger than the sum of its proper divisors (27401).

12100999 is an equidigital number, since it uses as much as digits as its factorization.

12100999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27400.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 12100999 is about 3478.6490193752. The cubic root of 12100999 is about 229.5833604047.

The spelling of 12100999 in words is "twelve million, one hundred thousand, nine hundred ninety-nine".