123253221 has 24 divisors (see below), whose sum is σ = 203378880. Its totient is φ = 65010816.

The previous prime is 123253211. The next prime is 123253243. The reversal of 123253221 is 122352321.

It is not a de Polignac number, because 123253221 - 2⁶ = 123253157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123253211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13816 + ... + 20913.

It is an arithmetic number, because the mean of its divisors is an integer number (8474120).

Almost surely, 2^123253221 is an apocalyptic number.

It is an amenable number.

123253221 is a deficient number, since it is larger than the sum of its proper divisors (80125659).

123253221 is a wasteful number, since it uses less digits than its factorization.

123253221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34765 (or 34752 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 123253221 is about 11101.9467211836. The cubic root of 123253221 is about 497.6600274738.

The spelling of 123253221 in words is "one hundred twenty-three million, two hundred fifty-three thousand, two hundred twenty-one".