221123213023 has 2 divisors, whose sum is σ = 221123213024. Its totient is φ = 221123213022.

The previous prime is 221123212993. The next prime is 221123213039. The reversal of 221123213023 is 320312321122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221123213023 - 2¹⁷ = 221123081951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221123212985 and 221123213003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221123213323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110561606511 + 110561606512.

It is an arithmetic number, because the mean of its divisors is an integer number (110561606512).

Almost surely, 2^221123213023 is an apocalyptic number.

221123213023 is a deficient number, since it is larger than the sum of its proper divisors (1).

221123213023 is an equidigital number, since it uses as much as digits as its factorization.

221123213023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 221123213023 its reverse (320312321122), we get a palindrome (541435534145).

The spelling of 221123213023 in words is "two hundred twenty-one billion, one hundred twenty-three million, two hundred thirteen thousand, twenty-three".