12111221993939 has 2 divisors, whose sum is σ = 12111221993940. Its totient is φ = 12111221993938.

The previous prime is 12111221993887. The next prime is 12111221993947. The reversal of 12111221993939 is 93939912211121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12111221993939 - 2¹² = 12111221989843 is a prime.

It is not a weakly prime, because it can be changed into another prime (12111221993639) 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, 6055610996969 + 6055610996970.

It is an arithmetic number, because the mean of its divisors is an integer number (6055610996970).

Almost surely, 2^{12111221993939} is an apocalyptic number.

12111221993939 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111221993939 is an equidigital number, since it uses as much as digits as its factorization.

12111221993939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 472392, while the sum is 53.

The spelling of 12111221993939 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, nine hundred ninety-three thousand, nine hundred thirty-nine".