111240109 has 2 divisors, whose sum is σ = 111240110. Its totient is φ = 111240108.

The previous prime is 111240067. The next prime is 111240113. The reversal of 111240109 is 901042111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111239209 + 900 = 10547^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 111240109 - 2¹³ = 111231917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111240139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55620054 + 55620055.

It is an arithmetic number, because the mean of its divisors is an integer number (55620055).

Almost surely, 2^111240109 is an apocalyptic number.

It is an amenable number.

111240109 is a deficient number, since it is larger than the sum of its proper divisors (1).

111240109 is an equidigital number, since it uses as much as digits as its factorization.

111240109 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 19.

The square root of 111240109 is about 10547.0426660747. The cubic root of 111240109 is about 480.9358319663.

The spelling of 111240109 in words is "one hundred eleven million, two hundred forty thousand, one hundred nine".