1121323138 has 16 divisors (see below), whose sum is σ = 1813512960. Its totient is φ = 516920976.

The previous prime is 1121323127. The next prime is 1121323139. The reversal of 1121323138 is 8313231211.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1121323139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2770 + ... + 47437.

It is an arithmetic number, because the mean of its divisors is an integer number (113344560).

Almost surely, 2^1121323138 is an apocalyptic number.

1121323138 is a deficient number, since it is larger than the sum of its proper divisors (692189822).

1121323138 is a wasteful number, since it uses less digits than its factorization.

1121323138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51081.

The product of its digits is 864, while the sum is 25.

The square root of 1121323138 is about 33486.1633813132. The cubic root of 1121323138 is about 1038.9076109975.

Adding to 1121323138 its reverse (8313231211), we get a palindrome (9434554349).

The spelling of 1121323138 in words is "one billion, one hundred twenty-one million, three hundred twenty-three thousand, one hundred thirty-eight".