1212121212199 has 2 divisors, whose sum is σ = 1212121212200. Its totient is φ = 1212121212198.

The previous prime is 1212121212131. The next prime is 1212121212229. The reversal of 1212121212199 is 9912121212121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212121212199 - 2¹¹ = 1212121210151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212121212109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606060606099 + 606060606100.

It is an arithmetic number, because the mean of its divisors is an integer number (606060606100).

Almost surely, 2^{1212121212199} is an apocalyptic number.

1212121212199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212121212199 is an equidigital number, since it uses as much as digits as its factorization.

1212121212199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 34.

The spelling of 1212121212199 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, one hundred ninety-nine".