12402023123 has 4 divisors (see below), whose sum is σ = 14173740720. Its totient is φ = 10630305528.

The previous prime is 12402023113. The next prime is 12402023189. The reversal of 12402023123 is 32132020421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32132020421 = 967 ⋅33228563.

It is a cyclic number.

It is not a de Polignac number, because 12402023123 - 2¹⁴ = 12402006739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12402023095 and 12402023104.

It is not an unprimeable number, because it can be changed into a prime (12402023113) 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, 885858788 + ... + 885858801.

It is an arithmetic number, because the mean of its divisors is an integer number (3543435180).

Almost surely, 2^12402023123 is an apocalyptic number.

12402023123 is a deficient number, since it is larger than the sum of its proper divisors (1771717597).

12402023123 is an equidigital number, since it uses as much as digits as its factorization.

12402023123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771717596.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12402023123 its reverse (32132020421), we get a palindrome (44534043544).

The spelling of 12402023123 in words is "twelve billion, four hundred two million, twenty-three thousand, one hundred twenty-three".