221230311173 has 2 divisors, whose sum is σ = 221230311174. Its totient is φ = 221230311172.

The previous prime is 221230311149. The next prime is 221230311233. The reversal of 221230311173 is 371113032122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160269713569 + 60960597604 = 400337^2 + 246902^2 .

It is a cyclic number.

It is not a de Polignac number, because 221230311173 - 2³⁰ = 220156569349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221230311103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110615155586 + 110615155587.

It is an arithmetic number, because the mean of its divisors is an integer number (110615155587).

Almost surely, 2^221230311173 is an apocalyptic number.

It is an amenable number.

221230311173 is a deficient number, since it is larger than the sum of its proper divisors (1).

221230311173 is an equidigital number, since it uses as much as digits as its factorization.

221230311173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 221230311173 its reverse (371113032122), we get a palindrome (592343343295).

The spelling of 221230311173 in words is "two hundred twenty-one billion, two hundred thirty million, three hundred eleven thousand, one hundred seventy-three".