11303538221 has 24 divisors (see below), whose sum is σ = 12386492160. Its totient is φ = 10305453312.

The previous prime is 11303538217. The next prime is 11303538227. The reversal of 11303538221 is 12283530311.

It is not a de Polignac number, because 11303538221 - 2² = 11303538217 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 (11303538227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2553416 + ... + 2557838.

It is an arithmetic number, because the mean of its divisors is an integer number (516103840).

Almost surely, 2^11303538221 is an apocalyptic number.

It is an amenable number.

11303538221 is a deficient number, since it is larger than the sum of its proper divisors (1082953939).

11303538221 is a wasteful number, since it uses less digits than its factorization.

11303538221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4733 (or 4716 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 11303538221 in words is "eleven billion, three hundred three million, five hundred thirty-eight thousand, two hundred twenty-one".