221020110323 has 4 divisors (see below), whose sum is σ = 221021635008. Its totient is φ = 221018585640.

The previous prime is 221020110301. The next prime is 221020110331. The reversal of 221020110323 is 323011020122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221020110323 - 2¹⁴ = 221020093939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221020119323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519011 + ... + 843452.

It is an arithmetic number, because the mean of its divisors is an integer number (55255408752).

Almost surely, 2^221020110323 is an apocalyptic number.

221020110323 is a deficient number, since it is larger than the sum of its proper divisors (1524685).

221020110323 is a wasteful number, since it uses less digits than its factorization.

221020110323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524684.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221020110323 its reverse (323011020122), we get a palindrome (544031130445).

The spelling of 221020110323 in words is "two hundred twenty-one billion, twenty million, one hundred ten thousand, three hundred twenty-three".