12150511817 has 4 divisors (see below), whose sum is σ = 12156653520. Its totient is φ = 12144370116.

The previous prime is 12150511801. The next prime is 12150511823. The reversal of 12150511817 is 71811505121.

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: 71811505121 = 4423 ⋅16235927.

It is a cyclic number.

It is not a de Polignac number, because 12150511817 - 2⁴ = 12150511801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12150511517) 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, 3067883 + ... + 3071840.

It is an arithmetic number, because the mean of its divisors is an integer number (3039163380).

Almost surely, 2^12150511817 is an apocalyptic number.

It is an amenable number.

12150511817 is a deficient number, since it is larger than the sum of its proper divisors (6141703).

12150511817 is an equidigital number, since it uses as much as digits as its factorization.

12150511817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6141702.

The product of its (nonzero) digits is 2800, while the sum is 32.

The spelling of 12150511817 in words is "twelve billion, one hundred fifty million, five hundred eleven thousand, eight hundred seventeen".