1002001221001 has 8 divisors (see below), whose sum is σ = 1093100673600. Its totient is φ = 910903173840.

The previous prime is 1002001220999. The next prime is 1002001221007. The reversal of 1002001221001 is 1001221002001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1002001221001 - 2¹ = 1002001220999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002001221007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1620540 + ... + 2151778.

It is an arithmetic number, because the mean of its divisors is an integer number (136637584200).

Almost surely, 2^{1002001221001} is an apocalyptic number.

1002001221001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1002001221001 is a deficient number, since it is larger than the sum of its proper divisors (91099452599).

1002001221001 is a wasteful number, since it uses less digits than its factorization.

1002001221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702719.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1002001221001 its reverse (1001221002001), we get a palindrome (2003222223002).

The spelling of 1002001221001 in words is "one trillion, two billion, one million, two hundred twenty-one thousand, one".