12111221100019 has 2 divisors, whose sum is σ = 12111221100020. Its totient is φ = 12111221100018.

The previous prime is 12111221099981. The next prime is 12111221100031. The reversal of 12111221100019 is 91000112211121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12111221100019 - 2¹⁵ = 12111221067251 is a prime.

It is a super-2 number, since 2×12111221100019² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12111221100059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055610550009 + 6055610550010.

It is an arithmetic number, because the mean of its divisors is an integer number (6055610550010).

Almost surely, 2^{12111221100019} is an apocalyptic number.

12111221100019 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111221100019 is an equidigital number, since it uses as much as digits as its factorization.

12111221100019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 12111221100019 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, one hundred thousand, nineteen".