111131102209217 has 2 divisors, whose sum is σ = 111131102209218. Its totient is φ = 111131102209216.

The previous prime is 111131102209207. The next prime is 111131102209223. The reversal of 111131102209217 is 712902201131111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61233817641616 + 49897284567601 = 7825204^2 + 7063801^2 .

It is a cyclic number.

It is not a de Polignac number, because 111131102209217 - 2¹² = 111131102205121 is a prime.

It is not a weakly prime, because it can be changed into another prime (111131102209207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55565551104608 + 55565551104609.

It is an arithmetic number, because the mean of its divisors is an integer number (55565551104609).

Almost surely, 2^{111131102209217} is an apocalyptic number.

It is an amenable number.

111131102209217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111131102209217 is an equidigital number, since it uses as much as digits as its factorization.

111131102209217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 32.

The spelling of 111131102209217 in words is "one hundred eleven trillion, one hundred thirty-one billion, one hundred two million, two hundred nine thousand, two hundred seventeen".