9903001311221 has 4 divisors (see below), whose sum is σ = 9912532593600. Its totient is φ = 9893470028844.

The previous prime is 9903001311211. The next prime is 9903001311253. The reversal of 9903001311221 is 1221131003099.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-9903001311221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9903001311211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4765639631 + ... + 4765641708.

It is an arithmetic number, because the mean of its divisors is an integer number (2478133148400).

Almost surely, 2^{9903001311221} is an apocalyptic number.

It is an amenable number.

9903001311221 is a deficient number, since it is larger than the sum of its proper divisors (9531282379).

9903001311221 is a wasteful number, since it uses less digits than its factorization.

9903001311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9531282378.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 9903001311221 in words is "nine trillion, nine hundred three billion, one million, three hundred eleven thousand, two hundred twenty-one".