1230123118 has 16 divisors (see below), whose sum is σ = 2219771520. Its totient is φ = 499448376.

The previous prime is 1230123109. The next prime is 1230123119. The reversal of 1230123118 is 8113210321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230123119) 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 7 ways as a sum of consecutive naturals, for example, 2311996 + ... + 2312527.

It is an arithmetic number, because the mean of its divisors is an integer number (138735720).

Almost surely, 2^1230123118 is an apocalyptic number.

1230123118 is a deficient number, since it is larger than the sum of its proper divisors (989648402).

1230123118 is a wasteful number, since it uses less digits than its factorization.

1230123118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4624551.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1230123118 is about 35073.1110396554. Note that the first 3 decimals coincide. The cubic root of 1230123118 is about 1071.4770174699.

Adding to 1230123118 its reverse (8113210321), we get a palindrome (9343333439).

The spelling of 1230123118 in words is "one billion, two hundred thirty million, one hundred twenty-three thousand, one hundred eighteen".