221321231111323 has 16 divisors (see below), whose sum is σ = 253199745064960. Its totient is φ = 189508031588736.

The previous prime is 221321231111317. The next prime is 221321231111327. The reversal of 221321231111323 is 323111132123122.

221321231111323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-221321231111323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221321231111291 and 221321231111300.

It is not an unprimeable number, because it can be changed into a prime (221321231111327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172737190 + ... + 174013732.

It is an arithmetic number, because the mean of its divisors is an integer number (15824984066560).

Almost surely, 2^{221321231111323} is an apocalyptic number.

221321231111323 is a deficient number, since it is larger than the sum of its proper divisors (31878513953637).

221321231111323 is a wasteful number, since it uses less digits than its factorization.

221321231111323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302106.

The product of its digits is 2592, while the sum is 28.

Adding to 221321231111323 its reverse (323111132123122), we get a palindrome (544432363234445).

The spelling of 221321231111323 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, two hundred thirty-one million, one hundred eleven thousand, three hundred twenty-three".