12001211209943 has 2 divisors, whose sum is σ = 12001211209944. Its totient is φ = 12001211209942.

The previous prime is 12001211209927. The next prime is 12001211209987. The reversal of 12001211209943 is 34990211210021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12001211209943 - 2⁴ = 12001211209927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12001211509943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000605604971 + 6000605604972.

It is an arithmetic number, because the mean of its divisors is an integer number (6000605604972).

Almost surely, 2^{12001211209943} is an apocalyptic number.

12001211209943 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001211209943 is an equidigital number, since it uses as much as digits as its factorization.

12001211209943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

Adding to 12001211209943 its reverse (34990211210021), we get a palindrome (46991422419964).

The spelling of 12001211209943 in words is "twelve trillion, one billion, two hundred eleven million, two hundred nine thousand, nine hundred forty-three".