1230043123 has 4 divisors (see below), whose sum is σ = 1230352600. Its totient is φ = 1229733648.

The previous prime is 1230043117. The next prime is 1230043181. The reversal of 1230043123 is 3213400321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3213400321 = 37897 ⋅84793.

It is a cyclic number.

It is not a de Polignac number, because 1230043123 - 2¹³ = 1230034931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230043123.

It is not an unprimeable number, because it can be changed into a prime (1230047123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148698 + ... + 156751.

It is an arithmetic number, because the mean of its divisors is an integer number (307588150).

Almost surely, 2^1230043123 is an apocalyptic number.

1230043123 is a deficient number, since it is larger than the sum of its proper divisors (309477).

1230043123 is an equidigital number, since it uses as much as digits as its factorization.

1230043123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309476.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1230043123 is about 35071.9706175744. The cubic root of 1230043123 is about 1071.4537908891.

Adding to 1230043123 its reverse (3213400321), we get a palindrome (4443443444).

The spelling of 1230043123 in words is "one billion, two hundred thirty million, forty-three thousand, one hundred twenty-three".