221331310131223 has 4 divisors (see below), whose sum is σ = 221969152523880. Its totient is φ = 220693467738568.

The previous prime is 221331310131187. The next prime is 221331310131257. The reversal of 221331310131223 is 322131013133122.

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 221331310131223 - 2²¹ = 221331308034071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221331310131191 and 221331310131200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331310141223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318921195808 + ... + 318921196501.

It is an arithmetic number, because the mean of its divisors is an integer number (55492288130970).

Almost surely, 2^{221331310131223} is an apocalyptic number.

221331310131223 is a deficient number, since it is larger than the sum of its proper divisors (637842392657).

221331310131223 is an equidigital number, since it uses as much as digits as its factorization.

221331310131223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637842392656.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 221331310131223 its reverse (322131013133122), we get a palindrome (543462323264345).

The spelling of 221331310131223 in words is "two hundred twenty-one trillion, three hundred thirty-one billion, three hundred ten million, one hundred thirty-one thousand, two hundred twenty-three".