12001111211 has 2 divisors, whose sum is σ = 12001111212. Its totient is φ = 12001111210.

The previous prime is 12001111201. The next prime is 12001111231. The reversal of 12001111211 is 11211110021.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001111211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001111192 and 12001111201.

It is not a weakly prime, because it can be changed into another prime (12001111201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000555605 + 6000555606.

It is an arithmetic number, because the mean of its divisors is an integer number (6000555606).

Almost surely, 2^12001111211 is an apocalyptic number.

12001111211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001111211 is an equidigital number, since it uses as much as digits as its factorization.

12001111211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12001111211 its reverse (11211110021), we get a palindrome (23212221232).

The spelling of 12001111211 in words is "twelve billion, one million, one hundred eleven thousand, two hundred eleven".