12100000001 has 4 divisors (see below), whose sum is σ = 12112859604. Its totient is φ = 12087140400.

The previous prime is 12099999983. The next prime is 12100000051. The reversal of 12100000001 is 10000000121.

It is a happy number.

It is a Cunningham number, because it is equal to 110000²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7503024400 + 4596975601 = 86620^2 + 67801^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100000001 - 2⁶ = 12099999937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12100000051) 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, 6428390 + ... + 6430271.

It is an arithmetic number, because the mean of its divisors is an integer number (3028214901).

Almost surely, 2^12100000001 is an apocalyptic number.

It is an amenable number.

12100000001 is a deficient number, since it is larger than the sum of its proper divisors (12859603).

12100000001 is an equidigital number, since it uses as much as digits as its factorization.

12100000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12859602.

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 12100000001 its reverse (10000000121), we get a palindrome (22100000122).

The spelling of 12100000001 in words is "twelve billion, one hundred million, one", and thus it is an aban number.