1121142973 has 16 divisors (see below), whose sum is σ = 1164983472. Its totient is φ = 1078272000.

The previous prime is 1121142943. The next prime is 1121143087. The reversal of 1121142973 is 3792411211.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 31684 + 1121111289 = 178^2 + 33483^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121142973 - 2⁹ = 1121142461 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 (1121142923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1748733 + ... + 1749373.

It is an arithmetic number, because the mean of its divisors is an integer number (72811467).

Almost surely, 2^1121142973 is an apocalyptic number.

It is an amenable number.

1121142973 is a deficient number, since it is larger than the sum of its proper divisors (43840499).

1121142973 is an equidigital number, since it uses as much as digits as its factorization.

1121142973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its digits is 3024, while the sum is 31.

The square root of 1121142973 is about 33483.4731322783. The cubic root of 1121142973 is about 1038.8519669674.

The spelling of 1121142973 in words is "one billion, one hundred twenty-one million, one hundred forty-two thousand, nine hundred seventy-three".