111131145 has 12 divisors (see below), whose sum is σ = 192627396. Its totient is φ = 59269920.

The previous prime is 111131131. The next prime is 111131149. The reversal of 111131145 is 541131111.

It can be written as a sum of positive squares in 2 ways, for example, as 72641529 + 38489616 = 8523^2 + 6204^2 .

It is not a de Polignac number, because 111131145 - 2⁹ = 111130633 is a prime.

It is a super-2 number, since 2×111131145² = 24700262778022050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111131149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1234746 + ... + 1234835.

It is an arithmetic number, because the mean of its divisors is an integer number (16052283).

Almost surely, 2^111131145 is an apocalyptic number.

111131145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111131145 is a deficient number, since it is larger than the sum of its proper divisors (81496251).

111131145 is a wasteful number, since it uses less digits than its factorization.

111131145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469592 (or 2469589 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 111131145 is about 10541.8757818521. The cubic root of 111131145 is about 480.7787489004.

Adding to 111131145 its reverse (541131111), we get a palindrome (652262256).

The spelling of 111131145 in words is "one hundred eleven million, one hundred thirty-one thousand, one hundred forty-five".