1103431111 has 4 divisors (see below), whose sum is σ = 1103582592. Its totient is φ = 1103279632.

The previous prime is 1103431103. The next prime is 1103431117. The reversal of 1103431111 is 1111343011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1111343011 = 1621 ⋅685591.

It is a cyclic number.

It is not a de Polignac number, because 1103431111 - 2³ = 1103431103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103431117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64231 + ... + 79576.

It is an arithmetic number, because the mean of its divisors is an integer number (275895648).

Almost surely, 2^1103431111 is an apocalyptic number.

1103431111 is a deficient number, since it is larger than the sum of its proper divisors (151481).

1103431111 is an equidigital number, since it uses as much as digits as its factorization.

1103431111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151480.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1103431111 is about 33217.9335751037. The cubic root of 1103431111 is about 1033.3522946804.

Adding to 1103431111 its reverse (1111343011), we get a palindrome (2214774122).

The spelling of 1103431111 in words is "one billion, one hundred three million, four hundred thirty-one thousand, one hundred eleven".