12111122220013 has 2 divisors, whose sum is σ = 12111122220014. Its totient is φ = 12111122220012.

The previous prime is 12111122219971. The next prime is 12111122220173. The reversal of 12111122220013 is 31002222111121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8100182750724 + 4010939469289 = 2846082^2 + 2002733^2 .

It is an emirp because it is prime and its reverse (31002222111121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12111122220013 - 2¹³ = 12111122211821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111122221013) 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, 6055561110006 + 6055561110007.

It is an arithmetic number, because the mean of its divisors is an integer number (6055561110007).

Almost surely, 2^{12111122220013} is an apocalyptic number.

It is an amenable number.

12111122220013 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111122220013 is an equidigital number, since it uses as much as digits as its factorization.

12111122220013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12111122220013 its reverse (31002222111121), we get a palindrome (43113344331134).

The spelling of 12111122220013 in words is "twelve trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty thousand, thirteen".