221331221323 has 2 divisors, whose sum is σ = 221331221324. Its totient is φ = 221331221322.

The previous prime is 221331221303. The next prime is 221331221341. The reversal of 221331221323 is 323122133122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221331221323 - 2²⁹ = 220794350411 is a prime.

It is not a weakly prime, because it can be changed into another prime (221331221303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110665610661 + 110665610662.

It is an arithmetic number, because the mean of its divisors is an integer number (110665610662).

Almost surely, 2^221331221323 is an apocalyptic number.

221331221323 is a deficient number, since it is larger than the sum of its proper divisors (1).

221331221323 is an equidigital number, since it uses as much as digits as its factorization.

221331221323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

Adding to 221331221323 its reverse (323122133122), we get a palindrome (544453354445).

The spelling of 221331221323 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-one thousand, three hundred twenty-three".