1002000101221 has 4 divisors (see below), whose sum is σ = 1145142972832. Its totient is φ = 858857229612.

The previous prime is 1002000101209. The next prime is 1002000101231. The reversal of 1002000101221 is 1221010002001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1002000101221 - 2¹⁵ = 1002000068453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002000101198 and 1002000101207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002000101231) 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, 71571435795 + ... + 71571435808.

It is an arithmetic number, because the mean of its divisors is an integer number (286285743208).

Almost surely, 2^{1002000101221} is an apocalyptic number.

It is an amenable number.

1002000101221 is a deficient number, since it is larger than the sum of its proper divisors (143142871611).

1002000101221 is an equidigital number, since it uses as much as digits as its factorization.

1002000101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143142871610.

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

Adding to 1002000101221 its reverse (1221010002001), we get a palindrome (2223010103222).

The spelling of 1002000101221 in words is "one trillion, two billion, one hundred one thousand, two hundred twenty-one".