123411221 has 4 divisors (see below), whose sum is σ = 123443244. Its totient is φ = 123379200.

The previous prime is 123411199. The next prime is 123411229. The reversal of 123411221 is 122114321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74200996 + 49210225 = 8614^2 + 7015^2 .

It is a cyclic number.

It is not a de Polignac number, because 123411221 - 2¹⁰ = 123410197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123411221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123411229) 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, 9290 + ... + 18251.

It is an arithmetic number, because the mean of its divisors is an integer number (30860811).

Almost surely, 2^123411221 is an apocalyptic number.

It is an amenable number.

123411221 is a deficient number, since it is larger than the sum of its proper divisors (32023).

123411221 is an equidigital number, since it uses as much as digits as its factorization.

123411221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32022.

The product of its digits is 96, while the sum is 17.

The square root of 123411221 is about 11109.0603112955. The cubic root of 123411221 is about 497.8725890835.

Adding to 123411221 its reverse (122114321), we get a palindrome (245525542).

The spelling of 123411221 in words is "one hundred twenty-three million, four hundred eleven thousand, two hundred twenty-one".