12102020110091 has 4 divisors (see below), whose sum is σ = 12519331148400. Its totient is φ = 11684709071784.

The previous prime is 12102020110087. The next prime is 12102020110099. The reversal of 12102020110091 is 19001102020121.

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 12102020110091 - 2² = 12102020110087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12102020110099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208655519111 + ... + 208655519168.

It is an arithmetic number, because the mean of its divisors is an integer number (3129832787100).

Almost surely, 2^{12102020110091} is an apocalyptic number.

12102020110091 is a deficient number, since it is larger than the sum of its proper divisors (417311038309).

12102020110091 is an equidigital number, since it uses as much as digits as its factorization.

12102020110091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417311038308.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 12102020110091 in words is "twelve trillion, one hundred two billion, twenty million, one hundred ten thousand, ninety-one".