1231300123 has 4 divisors (see below), whose sum is σ = 1303729560. Its totient is φ = 1158870688.

The previous prime is 1231300121. The next prime is 1231300163. The reversal of 1231300123 is 3210031321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1231300123 - 2¹ = 1231300121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231300097 and 1231300106.

It is not an unprimeable number, because it can be changed into a prime (1231300121) 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 3 ways as a sum of consecutive naturals, for example, 36214693 + ... + 36214726.

It is an arithmetic number, because the mean of its divisors is an integer number (325932390).

Almost surely, 2^1231300123 is an apocalyptic number.

1231300123 is a deficient number, since it is larger than the sum of its proper divisors (72429437).

1231300123 is an equidigital number, since it uses as much as digits as its factorization.

1231300123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72429436.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1231300123 is about 35089.8863349541. The cubic root of 1231300123 is about 1071.8186450075.

Adding to 1231300123 its reverse (3210031321), we get a palindrome (4441331444).

The spelling of 1231300123 in words is "one billion, two hundred thirty-one million, three hundred thousand, one hundred twenty-three".