221311321303 has 8 divisors (see below), whose sum is σ = 230951828448. Its totient is φ = 211672337184.

The previous prime is 221311321277. The next prime is 221311321321. The reversal of 221311321303 is 303123113122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221311321303 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 (221311321333) 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, 78700 + ... + 669937.

It is an arithmetic number, because the mean of its divisors is an integer number (28868978556).

Almost surely, 2^221311321303 is an apocalyptic number.

221311321303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221311321303 is a deficient number, since it is larger than the sum of its proper divisors (9640507145).

221311321303 is a wasteful number, since it uses less digits than its factorization.

221311321303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761513.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 221311321303 its reverse (303123113122), we get a palindrome (524434434425).

The spelling of 221311321303 in words is "two hundred twenty-one billion, three hundred eleven million, three hundred twenty-one thousand, three hundred three".