111357109 has 2 divisors, whose sum is σ = 111357110. Its totient is φ = 111357108.

The previous prime is 111357091. The next prime is 111357121. The reversal of 111357109 is 901753111.

Together with previous prime (111357091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108618084 + 2739025 = 10422^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 111357109 - 2⁷ = 111356981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111357139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55678554 + 55678555.

It is an arithmetic number, because the mean of its divisors is an integer number (55678555).

Almost surely, 2^111357109 is an apocalyptic number.

It is an amenable number.

111357109 is a deficient number, since it is larger than the sum of its proper divisors (1).

111357109 is an equidigital number, since it uses as much as digits as its factorization.

111357109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 945, while the sum is 28.

The square root of 111357109 is about 10552.5877868891. The cubic root of 111357109 is about 481.1043856072.

The spelling of 111357109 in words is "one hundred eleven million, three hundred fifty-seven thousand, one hundred nine".