12145023361 has 4 divisors (see below), whose sum is σ = 12563817300. Its totient is φ = 11726229424.

The previous prime is 12145023313. The next prime is 12145023377. The reversal of 12145023361 is 16332054121.

12145023361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16332054121 = 2753 ⋅5932457.

It can be written as a sum of positive squares in 2 ways, for example, as 10207262961 + 1937760400 = 101031^2 + 44020^2 .

It is a cyclic number.

It is not a de Polignac number, because 12145023361 - 2⁹ = 12145022849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12145020361) 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, 209396926 + ... + 209396983.

It is an arithmetic number, because the mean of its divisors is an integer number (3140954325).

Almost surely, 2^12145023361 is an apocalyptic number.

It is an amenable number.

12145023361 is a deficient number, since it is larger than the sum of its proper divisors (418793939).

12145023361 is an equidigital number, since it uses as much as digits as its factorization.

12145023361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418793938.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 12145023361 its reverse (16332054121), we get a palindrome (28477077482).

The spelling of 12145023361 in words is "twelve billion, one hundred forty-five million, twenty-three thousand, three hundred sixty-one".