12145120613 has 4 divisors (see below), whose sum is σ = 12270328140. Its totient is φ = 12019913088.

The previous prime is 12145120597. The next prime is 12145120621. The reversal of 12145120613 is 31602154121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7868222209 + 4276898404 = 88703^2 + 65398^2 .

It is a cyclic number.

It is not a de Polignac number, because 12145120613 - 2⁴ = 12145120597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145125613) 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, 62603618 + ... + 62603811.

It is an arithmetic number, because the mean of its divisors is an integer number (3067582035).

Almost surely, 2^12145120613 is an apocalyptic number.

It is an amenable number.

12145120613 is a deficient number, since it is larger than the sum of its proper divisors (125207527).

12145120613 is an equidigital number, since it uses as much as digits as its factorization.

12145120613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125207526.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 12145120613 its reverse (31602154121), we get a palindrome (43747274734).

The spelling of 12145120613 in words is "twelve billion, one hundred forty-five million, one hundred twenty thousand, six hundred thirteen".