12001221019 has 2 divisors, whose sum is σ = 12001221020. Its totient is φ = 12001221018.

The previous prime is 12001221017. The next prime is 12001221031. The reversal of 12001221019 is 91012210021.

It is a happy number.

12001221019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12001221019 - 2¹ = 12001221017 is a prime.

It is a super-2 number, since 2×12001221019² (a number of 21 digits) contains 22 as substring.

Together with 12001221017, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12001220987 and 12001221005.

It is not a weakly prime, because it can be changed into another prime (12001221013) 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 as a sum of consecutive naturals, namely, 6000610509 + 6000610510.

It is an arithmetic number, because the mean of its divisors is an integer number (6000610510).

Almost surely, 2^12001221019 is an apocalyptic number.

12001221019 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001221019 is an equidigital number, since it uses as much as digits as its factorization.

12001221019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 12001221019 in words is "twelve billion, one million, two hundred twenty-one thousand, nineteen".