12091819101 has 4 divisors (see below), whose sum is σ = 16122425472. Its totient is φ = 8061212732.

The previous prime is 12091819087. The next prime is 12091819121. The reversal of 12091819101 is 10191819021.

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 12091819101 - 2¹⁰ = 12091818077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12091819121) 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, 2015303181 + ... + 2015303186.

It is an arithmetic number, because the mean of its divisors is an integer number (4030606368).

Almost surely, 2^12091819101 is an apocalyptic number.

It is an amenable number.

12091819101 is a deficient number, since it is larger than the sum of its proper divisors (4030606371).

12091819101 is an equidigital number, since it uses as much as digits as its factorization.

12091819101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030606370.

The product of its (nonzero) digits is 1296, while the sum is 33.

The spelling of 12091819101 in words is "twelve billion, ninety-one million, eight hundred nineteen thousand, one hundred one".