1212201101291 has 2 divisors, whose sum is σ = 1212201101292. Its totient is φ = 1212201101290.

The previous prime is 1212201101273. The next prime is 1212201101303. The reversal of 1212201101291 is 1921011022121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1921011022121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212201101291 - 2¹⁰ = 1212201100267 is a prime.

It is a super-2 number, since 2×1212201101291² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1212201101191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606100550645 + 606100550646.

It is an arithmetic number, because the mean of its divisors is an integer number (606100550646).

Almost surely, 2^{1212201101291} is an apocalyptic number.

1212201101291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212201101291 is an equidigital number, since it uses as much as digits as its factorization.

1212201101291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 1212201101291 in words is "one trillion, two hundred twelve billion, two hundred one million, one hundred one thousand, two hundred ninety-one".