12040540123 has 4 divisors (see below), whose sum is σ = 12320552728. Its totient is φ = 11760527520.

The previous prime is 12040540117. The next prime is 12040540147. The reversal of 12040540123 is 32104504021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32104504021 = 13063 ⋅2457667.

It is not a de Polignac number, because 12040540123 - 2⁹ = 12040539611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12040540094 and 12040540103.

It is not an unprimeable number, because it can be changed into a prime (12040540423) 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, 140006238 + ... + 140006323.

It is an arithmetic number, because the mean of its divisors is an integer number (3080138182).

Almost surely, 2^12040540123 is an apocalyptic number.

12040540123 is a deficient number, since it is larger than the sum of its proper divisors (280012605).

12040540123 is an equidigital number, since it uses as much as digits as its factorization.

12040540123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280012604.

The product of its (nonzero) digits is 960, while the sum is 22.

The spelling of 12040540123 in words is "twelve billion, forty million, five hundred forty thousand, one hundred twenty-three".