1001201221019 has 4 divisors (see below), whose sum is σ = 1001559948720. Its totient is φ = 1000842493320.

The previous prime is 1001201220997. The next prime is 1001201221049. The reversal of 1001201221019 is 9101221021001.

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 1001201221019 - 2²⁰ = 1001200172443 is a prime.

It is a super-2 number, since 2×1001201221019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001201221049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179359664 + ... + 179365245.

It is an arithmetic number, because the mean of its divisors is an integer number (250389987180).

Almost surely, 2^{1001201221019} is an apocalyptic number.

1001201221019 is a deficient number, since it is larger than the sum of its proper divisors (358727701).

1001201221019 is an equidigital number, since it uses as much as digits as its factorization.

1001201221019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358727700.

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

The spelling of 1001201221019 in words is "one trillion, one billion, two hundred one million, two hundred twenty-one thousand, nineteen".