1111122211109 has 2 divisors, whose sum is σ = 1111122211110. Its totient is φ = 1111122211108.

The previous prime is 1111122211093. The next prime is 1111122211141. The reversal of 1111122211109 is 9011122211111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1065003360100 + 46118851009 = 1031990^2 + 214753^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111122211109 - 2⁴ = 1111122211093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111122211159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555561105554 + 555561105555.

It is an arithmetic number, because the mean of its divisors is an integer number (555561105555).

Almost surely, 2^{1111122211109} is an apocalyptic number.

It is an amenable number.

1111122211109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111122211109 is an equidigital number, since it uses as much as digits as its factorization.

1111122211109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 23.

It can be divided in two parts, 1111122 and 211109, that added together give a palindrome (1322231).

The spelling of 1111122211109 in words is "one trillion, one hundred eleven billion, one hundred twenty-two million, two hundred eleven thousand, one hundred nine".