1001000201221 has 8 divisors (see below), whose sum is σ = 1026073134944. Its totient is φ = 976008806640.

The previous prime is 1001000201207. The next prime is 1001000201239. The reversal of 1001000201221 is 1221020001001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001000201221 - 2²⁵ = 1000966646789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001000201198 and 1001000201207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001000201321) 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, 20359926 + ... + 20409031.

It is an arithmetic number, because the mean of its divisors is an integer number (128259141868).

Almost surely, 2^{1001000201221} is an apocalyptic number.

It is an amenable number.

1001000201221 is a deficient number, since it is larger than the sum of its proper divisors (25072933723).

1001000201221 is an equidigital number, since it uses as much as digits as its factorization.

1001000201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40769571.

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

Adding to 1001000201221 its reverse (1221020001001), we get a palindrome (2222020202222).

The spelling of 1001000201221 in words is "one trillion, one billion, two hundred one thousand, two hundred twenty-one".