123221329 has 12 divisors (see below), whose sum is σ = 156370608. Its totient is φ = 96016200.

The previous prime is 123221297. The next prime is 123221341. The reversal of 123221329 is 923122321.

It is not a de Polignac number, because 123221329 - 2⁵ = 123221297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123221129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113767 + ... + 114844.

It is an arithmetic number, because the mean of its divisors is an integer number (13030884).

Almost surely, 2^123221329 is an apocalyptic number.

It is an amenable number.

123221329 is a deficient number, since it is larger than the sum of its proper divisors (33149279).

123221329 is a wasteful number, since it uses less digits than its factorization.

123221329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228636 (or 228629 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 123221329 is about 11100.5103035851. The cubic root of 123221329 is about 497.6171002854.

The spelling of 123221329 in words is "one hundred twenty-three million, two hundred twenty-one thousand, three hundred twenty-nine".