1123001331 has 4 divisors (see below), whose sum is σ = 1497335112. Its totient is φ = 748667552.

The previous prime is 1123001329. The next prime is 1123001389. The reversal of 1123001331 is 1331003211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1331003211 = 3 ⋅443667737.

It is a cyclic number.

It is not a de Polignac number, because 1123001331 - 2¹ = 1123001329 is a prime.

It is a super-2 number, since 2×1123001331² = 2522263978855543122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1123001331.

It is not an unprimeable number, because it can be changed into a prime (1123001431) 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, 187166886 + ... + 187166891.

It is an arithmetic number, because the mean of its divisors is an integer number (374333778).

Almost surely, 2^1123001331 is an apocalyptic number.

1123001331 is a deficient number, since it is larger than the sum of its proper divisors (374333781).

1123001331 is an equidigital number, since it uses as much as digits as its factorization.

1123001331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374333780.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1123001331 is about 33511.2120192630. The cubic root of 1123001331 is about 1039.4256354531.

Adding to 1123001331 its reverse (1331003211), we get a palindrome (2454004542).

The spelling of 1123001331 in words is "one billion, one hundred twenty-three million, one thousand, three hundred thirty-one".