1002001122019 has 4 divisors (see below), whose sum is σ = 1002085060680. Its totient is φ = 1001917183360.

The previous prime is 1002001121987. The next prime is 1002001122079. The reversal of 1002001122019 is 9102211002001.

It is a happy number.

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 1002001122019 - 2⁵ = 1002001121987 is a prime.

It is a super-2 number, since 2×1002001122019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002001121987 and 1002001122005.

It is not an unprimeable number, because it can be changed into a prime (1002001122079) 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, 41951422 + ... + 41975299.

It is an arithmetic number, because the mean of its divisors is an integer number (250521265170).

Almost surely, 2^{1002001122019} is an apocalyptic number.

1002001122019 is a deficient number, since it is larger than the sum of its proper divisors (83938661).

1002001122019 is an equidigital number, since it uses as much as digits as its factorization.

1002001122019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83938660.

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

The spelling of 1002001122019 in words is "one trillion, two billion, one million, one hundred twenty-two thousand, nineteen".