123203221 has 4 divisors (see below), whose sum is σ = 123226272. Its totient is φ = 123180172.

The previous prime is 123203219. The next prime is 123203251. The reversal of 123203221 is 122302321.

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.

It is a cyclic number.

It is not a de Polignac number, because 123203221 - 2¹ = 123203219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123203195 and 123203204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123203251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110 + ... + 15736.

It is an arithmetic number, because the mean of its divisors is an integer number (30806568).

Almost surely, 2^123203221 is an apocalyptic number.

It is an amenable number.

123203221 is a deficient number, since it is larger than the sum of its proper divisors (23051).

123203221 is an equidigital number, since it uses as much as digits as its factorization.

123203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23050.

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

The square root of 123203221 is about 11099.6946354393. The cubic root of 123203221 is about 497.5927233047.

Adding to 123203221 its reverse (122302321), we get a palindrome (245505542).

The spelling of 123203221 in words is "one hundred twenty-three million, two hundred three thousand, two hundred twenty-one".