123223121 has 16 divisors (see below), whose sum is σ = 147861504. Its totient is φ = 100400784.

The previous prime is 123223103. The next prime is 123223181. The reversal of 123223121 is 121322321.

It is a cyclic number.

It is not a de Polignac number, because 123223121 - 2⁶ = 123223057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123223121.

It is not an unprimeable number, because it can be changed into a prime (123223181) 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 15 ways as a sum of consecutive naturals, for example, 24596 + ... + 29178.

It is an arithmetic number, because the mean of its divisors is an integer number (9241344).

Almost surely, 2^123223121 is an apocalyptic number.

It is an amenable number.

123223121 is a deficient number, since it is larger than the sum of its proper divisors (24638383).

123223121 is a wasteful number, since it uses less digits than its factorization.

123223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4780.

The product of its digits is 144, while the sum is 17.

The square root of 123223121 is about 11100.5910203016. The cubic root of 123223121 is about 497.6195125450.

Adding to 123223121 its reverse (121322321), we get a palindrome (244545442).

The spelling of 123223121 in words is "one hundred twenty-three million, two hundred twenty-three thousand, one hundred twenty-one".