12612020189 has 4 divisors (see below), whose sum is σ = 12619095456. Its totient is φ = 12604944924.

The previous prime is 12612020173. The next prime is 12612020227. The reversal of 12612020189 is 98102021621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98102021621 = 2969 ⋅33042109.

It is a cyclic number.

It is not a de Polignac number, because 12612020189 - 2⁴ = 12612020173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12612020119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3534959 + ... + 3538524.

It is an arithmetic number, because the mean of its divisors is an integer number (3154773864).

Almost surely, 2^12612020189 is an apocalyptic number.

It is an amenable number.

12612020189 is a deficient number, since it is larger than the sum of its proper divisors (7075267).

12612020189 is an equidigital number, since it uses as much as digits as its factorization.

12612020189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7075266.

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 12612020189 in words is "twelve billion, six hundred twelve million, twenty thousand, one hundred eighty-nine".