1128231103 has 4 divisors (see below), whose sum is σ = 1129099608. Its totient is φ = 1127362600.

The previous prime is 1128231067. The next prime is 1128231113. The reversal of 1128231103 is 3011328211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1128231103 - 2¹³ = 1128222911 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 (1128231113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432301 + ... + 434902.

It is an arithmetic number, because the mean of its divisors is an integer number (282274902).

Almost surely, 2^1128231103 is an apocalyptic number.

1128231103 is a deficient number, since it is larger than the sum of its proper divisors (868505).

1128231103 is an equidigital number, since it uses as much as digits as its factorization.

1128231103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868504.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1128231103 is about 33589.1515671355. The cubic root of 1128231103 is about 1041.0366583288.

Adding to 1128231103 its reverse (3011328211), we get a palindrome (4139559314).

The spelling of 1128231103 in words is "one billion, one hundred twenty-eight million, two hundred thirty-one thousand, one hundred three".