12012888529 has 4 divisors (see below), whose sum is σ = 12645145840. Its totient is φ = 11380631220.

The previous prime is 12012888527. The next prime is 12012888571. The reversal of 12012888529 is 92588821021.

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: 92588821021 = 33013 ⋅2804617.

It is a cyclic number.

It is not a de Polignac number, because 12012888529 - 2¹ = 12012888527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012888527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316128627 + ... + 316128664.

It is an arithmetic number, because the mean of its divisors is an integer number (3161286460).

Almost surely, 2^12012888529 is an apocalyptic number.

12012888529 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12012888529 is a deficient number, since it is larger than the sum of its proper divisors (632257311).

12012888529 is an equidigital number, since it uses as much as digits as its factorization.

12012888529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632257310.

The product of its (nonzero) digits is 184320, while the sum is 46.

The spelling of 12012888529 in words is "twelve billion, twelve million, eight hundred eighty-eight thousand, five hundred twenty-nine".