1131424123 has 4 divisors (see below), whose sum is σ = 1131514840. Its totient is φ = 1131333408.

The previous prime is 1131424087. The next prime is 1131424163. The reversal of 1131424123 is 3214241311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3214241311 = 47 ⋅68388113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131424123 is a prime.

It is a super-2 number, since 2×1131424123² = 2560241092212638258, 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 = 1131424094 and 1131424103.

It is not an unprimeable number, because it can be changed into a prime (1131424163) 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, 22965 + ... + 52822.

It is an arithmetic number, because the mean of its divisors is an integer number (282878710).

Almost surely, 2^1131424123 is an apocalyptic number.

1131424123 is a deficient number, since it is larger than the sum of its proper divisors (90717).

1131424123 is an equidigital number, since it uses as much as digits as its factorization.

1131424123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90716.

The product of its digits is 576, while the sum is 22.

The square root of 1131424123 is about 33636.6485102187. The cubic root of 1131424123 is about 1042.0178166427.

Adding to 1131424123 its reverse (3214241311), we get a palindrome (4345665434).

The spelling of 1131424123 in words is "one billion, one hundred thirty-one million, four hundred twenty-four thousand, one hundred twenty-three".