221323323123 has 24 divisors (see below), whose sum is σ = 365784556800. Its totient is φ = 126323209584.

The previous prime is 221323323101. The next prime is 221323323149. The reversal of 221323323123 is 321323323122.

221323323123 is a `hidden beast` number, since 2 + 2 + 1 + 323 + 323 + 12 + 3 = 666.

It is not a de Polignac number, because 221323323123 - 2²¹ = 221321225971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221323323173) 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, 1990743 + ... + 2098976.

It is an arithmetic number, because the mean of its divisors is an integer number (15241023200).

Almost surely, 2^221323323123 is an apocalyptic number.

221323323123 is a deficient number, since it is larger than the sum of its proper divisors (144461233677).

221323323123 is a wasteful number, since it uses less digits than its factorization.

221323323123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090591 (or 4090588 counting only the distinct ones).

The product of its digits is 7776, while the sum is 27.

Adding to 221323323123 its reverse (321323323122), we get a palindrome (542646646245).

Subtracting 221323323123 from its reverse (321323323122), we obtain a palindrome (99999999999).

It can be divided in two parts, 221323 and 323123, that added together give a triangular number (544446 = T₁₀₄₃).

The spelling of 221323323123 in words is "two hundred twenty-one billion, three hundred twenty-three million, three hundred twenty-three thousand, one hundred twenty-three".