1213111221199 has 2 divisors, whose sum is σ = 1213111221200. Its totient is φ = 1213111221198.

The previous prime is 1213111221191. The next prime is 1213111221211. The reversal of 1213111221199 is 9911221113121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213111221199 - 2³ = 1213111221191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213111221191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606555610599 + 606555610600.

It is an arithmetic number, because the mean of its divisors is an integer number (606555610600).

Almost surely, 2^{1213111221199} is an apocalyptic number.

1213111221199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213111221199 is an equidigital number, since it uses as much as digits as its factorization.

1213111221199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 34.

The spelling of 1213111221199 in words is "one trillion, two hundred thirteen billion, one hundred eleven million, two hundred twenty-one thousand, one hundred ninety-nine".