123023221 has 4 divisors (see below), whose sum is σ = 126991744. Its totient is φ = 119054700.

The previous prime is 123023183. The next prime is 123023227. The reversal of 123023221 is 122320321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122320321 = 17 ⋅7195313.

It is a cyclic number.

It is not a de Polignac number, because 123023221 - 2⁷ = 123023093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123023195 and 123023204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123023227) 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 in 3 ways as a sum of consecutive naturals, for example, 1984215 + ... + 1984276.

It is an arithmetic number, because the mean of its divisors is an integer number (31747936).

Almost surely, 2^123023221 is an apocalyptic number.

It is an amenable number.

123023221 is a deficient number, since it is larger than the sum of its proper divisors (3968523).

123023221 is an equidigital number, since it uses as much as digits as its factorization.

123023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968522.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 123023221 is about 11091.5833405335. The cubic root of 123023221 is about 497.3502774121.

Adding to 123023221 its reverse (122320321), we get a palindrome (245343542).

The spelling of 123023221 in words is "one hundred twenty-three million, twenty-three thousand, two hundred twenty-one".