1131231123 has 32 divisors (see below), whose sum is σ = 1872864000. Its totient is φ = 668865600.

The previous prime is 1131231121. The next prime is 1131231151. The reversal of 1131231123 is 3211321311.

It is not a de Polignac number, because 1131231123 - 2¹ = 1131231121 is a prime.

It is a super-2 number, since 2×1131231123² = 2559367707287682258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131231096 and 1131231105.

It is not an unprimeable number, because it can be changed into a prime (1131231121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34273 + ... + 58626.

It is an arithmetic number, because the mean of its divisors is an integer number (58527000).

Almost surely, 2^1131231123 is an apocalyptic number.

1131231123 is a deficient number, since it is larger than the sum of its proper divisors (741632877).

1131231123 is a wasteful number, since it uses less digits than its factorization.

1131231123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92960 (or 92954 counting only the distinct ones).

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

The square root of 1131231123 is about 33633.7794932416. The cubic root of 1131231123 is about 1041.9585636267.

Adding to 1131231123 its reverse (3211321311), we get a palindrome (4342552434).

The spelling of 1131231123 in words is "one billion, one hundred thirty-one million, two hundred thirty-one thousand, one hundred twenty-three".