1230200123 has 4 divisors (see below), whose sum is σ = 1230396648. Its totient is φ = 1230003600.

The previous prime is 1230200093. The next prime is 1230200129. The reversal of 1230200123 is 3210020321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3210020321 = 97 ⋅33092993.

It is a cyclic number.

It is not a de Polignac number, because 1230200123 - 2¹² = 1230196027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1230200098 and 1230200107.

It is not an unprimeable number, because it can be changed into a prime (1230200129) 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 3 ways as a sum of consecutive naturals, for example, 88553 + ... + 101498.

It is an arithmetic number, because the mean of its divisors is an integer number (307599162).

Almost surely, 2^1230200123 is an apocalyptic number.

1230200123 is a deficient number, since it is larger than the sum of its proper divisors (196525).

1230200123 is an equidigital number, since it uses as much as digits as its factorization.

1230200123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196524.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1230200123 is about 35074.2088007698. The cubic root of 1230200123 is about 1071.4993749519.

Adding to 1230200123 its reverse (3210020321), we get a palindrome (4440220444).

The spelling of 1230200123 in words is "one billion, two hundred thirty million, two hundred thousand, one hundred twenty-three".