1231038123 has 12 divisors (see below), whose sum is σ = 1909365480. Its totient is φ = 703450272.

The previous prime is 1231038089. The next prime is 1231038163. The reversal of 1231038123 is 3218301321.

It is not a de Polignac number, because 1231038123 - 2³⁰ = 157296299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231038093 and 1231038102.

It is not an unprimeable number, because it can be changed into a prime (1231038163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4187058 + ... + 4187351.

It is an arithmetic number, because the mean of its divisors is an integer number (159113790).

Almost surely, 2^1231038123 is an apocalyptic number.

1231038123 is a deficient number, since it is larger than the sum of its proper divisors (678327357).

1231038123 is an equidigital number, since it uses as much as digits as its factorization.

1231038123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8374426 (or 8374419 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1231038123 is about 35086.1528669075. The cubic root of 1231038123 is about 1071.7426179421.

Adding to 1231038123 its reverse (3218301321), we get a palindrome (4449339444).

The spelling of 1231038123 in words is "one billion, two hundred thirty-one million, thirty-eight thousand, one hundred twenty-three".