12091115229 has 4 divisors (see below), whose sum is σ = 16121486976. Its totient is φ = 8060743484.

The previous prime is 12091115191. The next prime is 12091115251. The reversal of 12091115229 is 92251119021.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 12091115229 - 2²⁴ = 12074338013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12091115229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12091125229) 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, 2015185869 + ... + 2015185874.

It is an arithmetic number, because the mean of its divisors is an integer number (4030371744).

Almost surely, 2^12091115229 is an apocalyptic number.

It is an amenable number.

12091115229 is a deficient number, since it is larger than the sum of its proper divisors (4030371747).

12091115229 is an equidigital number, since it uses as much as digits as its factorization.

12091115229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030371746.

The product of its (nonzero) digits is 3240, while the sum is 33.

The spelling of 12091115229 in words is "twelve billion, ninety-one million, one hundred fifteen thousand, two hundred twenty-nine".