1123142031 has 20 divisors (see below), whose sum is σ = 1830306984. Its totient is φ = 680691600.

The previous prime is 1123141963. The next prime is 1123142039. The reversal of 1123142031 is 1302413211.

1123142031 is a `hidden beast` number, since 11 + 231 + 420 + 3 + 1 = 666.

It is not a de Polignac number, because 1123142031 - 2⁹ = 1123141519 is a prime.

It is a super-2 number, since 2×1123142031² = 2522896043597609922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123141995 and 1123142013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123142039) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 629380 + ... + 631161.

Almost surely, 2^1123142031 is an apocalyptic number.

1123142031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123142031 is a deficient number, since it is larger than the sum of its proper divisors (707164953).

1123142031 is a wasteful number, since it uses less digits than its factorization.

1123142031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260564 (or 1260555 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1123142031 is about 33513.3112509045. The cubic root of 1123142031 is about 1039.4690432614.

Adding to 1123142031 its reverse (1302413211), we get a palindrome (2425555242).

The spelling of 1123142031 in words is "one billion, one hundred twenty-three million, one hundred forty-two thousand, thirty-one".