221003313321 has 8 divisors (see below), whose sum is σ = 336766953664. Its totient is φ = 126287607600.

The previous prime is 221003313299. The next prime is 221003313367. The reversal of 221003313321 is 123313300122.

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

It is not a de Polignac number, because 221003313321 - 2³⁰ = 219929571497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10523967301 = 221003313321 / (2 + 2 + 1 + 0 + 0 + 3 + 3 + 1 + 3 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221003313121) 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, 5261983630 + ... + 5261983671.

It is an arithmetic number, because the mean of its divisors is an integer number (42095869208).

Almost surely, 2^221003313321 is an apocalyptic number.

221003313321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221003313321 is a deficient number, since it is larger than the sum of its proper divisors (115763640343).

221003313321 is a wasteful number, since it uses less digits than its factorization.

221003313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10523967311.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 221003313321 its reverse (123313300122), we get a palindrome (344316613443).

The spelling of 221003313321 in words is "two hundred twenty-one billion, three million, three hundred thirteen thousand, three hundred twenty-one".