123453221 has 12 divisors (see below), whose sum is σ = 126824544. Its totient is φ = 120159000.

The previous prime is 123453217. The next prime is 123453223. The reversal of 123453221 is 122354321.

It is not a de Polignac number, because 123453221 - 2² = 123453217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123453223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 817496 + ... + 817646.

It is an arithmetic number, because the mean of its divisors is an integer number (10568712).

Almost surely, 2^123453221 is an apocalyptic number.

It is an amenable number.

123453221 is a deficient number, since it is larger than the sum of its proper divisors (3371323).

123453221 is an equidigital number, since it uses as much as digits as its factorization.

123453221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 361 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 123453221 is about 11110.9504993947. The cubic root of 123453221 is about 497.9290622763.

The spelling of 123453221 in words is "one hundred twenty-three million, four hundred fifty-three thousand, two hundred twenty-one".