1111222212209 has 2 divisors, whose sum is σ = 1111222212210. Its totient is φ = 1111222212208.

The previous prime is 1111222212181. The next prime is 1111222212227. The reversal of 1111222212209 is 9022122221111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1095654160225 + 15568051984 = 1046735^2 + 124772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111222212209 - 2¹⁶ = 1111222146673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111222232209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555611106104 + 555611106105.

It is an arithmetic number, because the mean of its divisors is an integer number (555611106105).

Almost surely, 2^{1111222212209} is an apocalyptic number.

It is an amenable number.

1111222212209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111222212209 is an equidigital number, since it uses as much as digits as its factorization.

1111222212209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 1111222212209 in words is "one trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, two hundred nine".