111211110211109 has 2 divisors, whose sum is σ = 111211110211110. Its totient is φ = 111211110211108.

The previous prime is 111211110211093. The next prime is 111211110211153. The reversal of 111211110211109 is 901112011112111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68111596350625 + 43099513860484 = 8252975^2 + 6565022^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211110211109 - 2⁴ = 111211110211093 is a prime.

It is a super-2 number, since 2×111211110211109² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111211110211009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605555105554 + 55605555105555.

It is an arithmetic number, because the mean of its divisors is an integer number (55605555105555).

Almost surely, 2^{111211110211109} is an apocalyptic number.

It is an amenable number.

111211110211109 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211110211109 is an equidigital number, since it uses as much as digits as its factorization.

111211110211109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 23.

The spelling of 111211110211109 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred ten million, two hundred eleven thousand, one hundred nine".