12104229991 has 4 divisors (see below), whose sum is σ = 13833405712. Its totient is φ = 10375054272.

The previous prime is 12104229971. The next prime is 12104230013. The reversal of 12104229991 is 19992240121.

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

It is a cyclic number.

It is not a de Polignac number, because 12104229991 - 2²⁵ = 12070675559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12104229911) 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, 864587850 + ... + 864587863.

It is an arithmetic number, because the mean of its divisors is an integer number (3458351428).

Almost surely, 2^12104229991 is an apocalyptic number.

12104229991 is a deficient number, since it is larger than the sum of its proper divisors (1729175721).

12104229991 is an equidigital number, since it uses as much as digits as its factorization.

12104229991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729175720.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 12104229991 in words is "twelve billion, one hundred four million, two hundred twenty-nine thousand, nine hundred ninety-one".