1123121331 has 12 divisors (see below), whose sum is σ = 1707670120. Its totient is φ = 709339680.

The previous prime is 1123121287. The next prime is 1123121333. The reversal of 1123121331 is 1331213211.

It is not a de Polignac number, because 1123121331 - 2⁶ = 1123121267 is a prime.

It is a super-2 number, since 2×1123121331² = 2522803048294423122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123121333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3283810 + ... + 3284151.

Almost surely, 2^1123121331 is an apocalyptic number.

1123121331 is a deficient number, since it is larger than the sum of its proper divisors (584548789).

1123121331 is a wasteful number, since it uses less digits than its factorization.

1123121331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6567986 (or 6567983 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1123121331 is about 33513.0024169724. The cubic root of 1123121331 is about 1039.4626572655.

Adding to 1123121331 its reverse (1331213211), we get a palindrome (2454334542).

The spelling of 1123121331 in words is "one billion, one hundred twenty-three million, one hundred twenty-one thousand, three hundred thirty-one".