1001103112221 has 4 divisors (see below), whose sum is σ = 1334804149632. Its totient is φ = 667402074812.

The previous prime is 1001103112189. The next prime is 1001103112277. The reversal of 1001103112221 is 1222113011001.

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 1001103112221 - 2⁵ = 1001103112189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001103112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001103112021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166850518701 + ... + 166850518706.

It is an arithmetic number, because the mean of its divisors is an integer number (333701037408).

Almost surely, 2^{1001103112221} is an apocalyptic number.

It is an amenable number.

1001103112221 is a deficient number, since it is larger than the sum of its proper divisors (333701037411).

1001103112221 is an equidigital number, since it uses as much as digits as its factorization.

1001103112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333701037410.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1001103112221 its reverse (1222113011001), we get a palindrome (2223216123222).

The spelling of 1001103112221 in words is "one trillion, one billion, one hundred three million, one hundred twelve thousand, two hundred twenty-one".