12155014423 has 4 divisors (see below), whose sum is σ = 12197965288. Its totient is φ = 12112063560.

The previous prime is 12155014349. The next prime is 12155014481. The reversal of 12155014423 is 32441055121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32441055121 = 9749 ⋅3327629.

It is a cyclic number.

It is not a de Polignac number, because 12155014423 - 2¹³ = 12155006231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12155014391 and 12155014400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155014523) 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, 21475008 + ... + 21475573.

It is an arithmetic number, because the mean of its divisors is an integer number (3049491322).

Almost surely, 2^12155014423 is an apocalyptic number.

12155014423 is a deficient number, since it is larger than the sum of its proper divisors (42950865).

12155014423 is an equidigital number, since it uses as much as digits as its factorization.

12155014423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42950864.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 12155014423 its reverse (32441055121), we get a palindrome (44596069544).

The spelling of 12155014423 in words is "twelve billion, one hundred fifty-five million, fourteen thousand, four hundred twenty-three".