12145334213 has 4 divisors (see below), whose sum is σ = 12145611660. Its totient is φ = 12145056768.

The previous prime is 12145334189. The next prime is 12145334221. The reversal of 12145334213 is 31243354121.

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 5989676449 + 6155657764 = 77393^2 + 78458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12145334213 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 (12145334233) 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, 57020 + ... + 165957.

It is an arithmetic number, because the mean of its divisors is an integer number (3036402915).

Almost surely, 2^12145334213 is an apocalyptic number.

It is an amenable number.

12145334213 is a deficient number, since it is larger than the sum of its proper divisors (277447).

12145334213 is an equidigital number, since it uses as much as digits as its factorization.

12145334213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277446.

The product of its digits is 8640, while the sum is 29.

Adding to 12145334213 its reverse (31243354121), we get a palindrome (43388688334).

The spelling of 12145334213 in words is "twelve billion, one hundred forty-five million, three hundred thirty-four thousand, two hundred thirteen".