12001019 has 4 divisors (see below), whose sum is σ = 12012000. Its totient is φ = 11990040.

The previous prime is 12001001. The next prime is 12001021. The reversal of 12001019 is 91010021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001019 is a prime.

It is a super-2 number, since 2×12001019² = 288048914076722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000994 and 12001012.

It is not an unprimeable number, because it can be changed into a prime (12001819) 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, 3644 + ... + 6105.

It is an arithmetic number, because the mean of its divisors is an integer number (3003000).

Almost surely, 2^12001019 is an apocalyptic number.

12001019 is a deficient number, since it is larger than the sum of its proper divisors (10981).

12001019 is an equidigital number, since it uses as much as digits as its factorization.

12001019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10980.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 12001019 is about 3464.2486919966. The cubic root of 12001019 is about 228.9493286818.

The spelling of 12001019 in words is "twelve million, one thousand, nineteen".