1121111273 has 4 divisors (see below), whose sum is σ = 1121178240. Its totient is φ = 1121044308.

The previous prime is 1121111267. The next prime is 1121111293. The reversal of 1121111273 is 3721111211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3721111211 = 7841 ⋅474571.

It is a cyclic number.

It is not a de Polignac number, because 1121111273 - 2⁶ = 1121111209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121111293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16736 + ... + 50222.

It is an arithmetic number, because the mean of its divisors is an integer number (280294560).

Almost surely, 2^1121111273 is an apocalyptic number.

It is an amenable number.

1121111273 is a deficient number, since it is larger than the sum of its proper divisors (66967).

1121111273 is an equidigital number, since it uses as much as digits as its factorization.

1121111273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66966.

The product of its digits is 84, while the sum is 20.

The square root of 1121111273 is about 33482.9997610728. Note that the first 3 decimals coincide. The cubic root of 1121111273 is about 1038.8421757935.

Adding to 1121111273 its reverse (3721111211), we get a palindrome (4842222484).

The spelling of 1121111273 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, two hundred seventy-three".