1123133331 has 4 divisors (see below), whose sum is σ = 1497511112. Its totient is φ = 748755552.

The previous prime is 1123133273. The next prime is 1123133351. The reversal of 1123133331 is 1333313211.

1123133331 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1123133331 - 2¹⁸ = 1122871187 is a prime.

It is a super-2 number, since 2×1123133331² = 2522856958406311122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123133298 and 1123133307.

It is not an unprimeable number, because it can be changed into a prime (1123133351) 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, 187188886 + ... + 187188891.

It is an arithmetic number, because the mean of its divisors is an integer number (374377778).

Almost surely, 2^1123133331 is an apocalyptic number.

1123133331 is a deficient number, since it is larger than the sum of its proper divisors (374377781).

1123133331 is an equidigital number, since it uses as much as digits as its factorization.

1123133331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374377780.

The product of its digits is 486, while the sum is 21.

The square root of 1123133331 is about 33513.1814514826. The cubic root of 1123133331 is about 1039.4663593017.

Adding to 1123133331 its reverse (1333313211), we get a palindrome (2456446542).

The spelling of 1123133331 in words is "one billion, one hundred twenty-three million, one hundred thirty-three thousand, three hundred thirty-one".