12111000001 has 2 divisors, whose sum is σ = 12111000002. Its totient is φ = 12111000000.

The previous prime is 12110999993. The next prime is 12111000017. The reversal of 12111000001 is 10000011121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8248998976 + 3862001025 = 90824^2 + 62145^2 .

It is an emirp because it is prime and its reverse (10000011121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12111000001 - 2³ = 12110999993 is a prime.

It is not a weakly prime, because it can be changed into another prime (12111000101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055500000 + 6055500001.

It is an arithmetic number, because the mean of its divisors is an integer number (6055500001).

Almost surely, 2^12111000001 is an apocalyptic number.

It is an amenable number.

12111000001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111000001 is an equidigital number, since it uses as much as digits as its factorization.

12111000001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 12111000001 its reverse (10000011121), we get a palindrome (22111011122).

The spelling of 12111000001 in words is "twelve billion, one hundred eleven million, one", and thus it is an aban number.