12012112019 has 4 divisors (see below), whose sum is σ = 12238755696. Its totient is φ = 11785468344.

The previous prime is 12012111989. The next prime is 12012112027. The reversal of 12012112019 is 91021121021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91021121021 = 108203 ⋅841207.

It is a cyclic number.

It is not a de Polignac number, because 12012112019 - 2⁸ = 12012111763 is a prime.

It is a super-2 number, since 2×12012112019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012111019) 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, 113321759 + ... + 113321864.

It is an arithmetic number, because the mean of its divisors is an integer number (3059688924).

Almost surely, 2^12012112019 is an apocalyptic number.

12012112019 is a deficient number, since it is larger than the sum of its proper divisors (226643677).

12012112019 is an equidigital number, since it uses as much as digits as its factorization.

12012112019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226643676.

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

The spelling of 12012112019 in words is "twelve billion, twelve million, one hundred twelve thousand, nineteen".