12111011012099 has 4 divisors (see below), whose sum is σ = 12132295742040. Its totient is φ = 12089726282160.

The previous prime is 12111011012059. The next prime is 12111011012129. The reversal of 12111011012099 is 99021011011121.

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 12111011012099 - 2¹⁶ = 12111010946563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111011012059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10642364117 + ... + 10642365254.

It is an arithmetic number, because the mean of its divisors is an integer number (3033073935510).

Almost surely, 2^{12111011012099} is an apocalyptic number.

12111011012099 is a deficient number, since it is larger than the sum of its proper divisors (21284729941).

12111011012099 is an equidigital number, since it uses as much as digits as its factorization.

12111011012099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21284729940.

The product of its (nonzero) digits is 324, while the sum is 29.

The spelling of 12111011012099 in words is "twelve trillion, one hundred eleven billion, eleven million, twelve thousand, ninety-nine".