123442221 has 48 divisors (see below), whose sum is σ = 203467200. Its totient is φ = 66189312.

The previous prime is 123442213. The next prime is 123442237. The reversal of 123442221 is 122244321.

It is not a de Polignac number, because 123442221 - 2³ = 123442213 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 (123442201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 538935 + ... + 539163.

It is an arithmetic number, because the mean of its divisors is an integer number (4238900).

Almost surely, 2^123442221 is an apocalyptic number.

It is an amenable number.

123442221 is a deficient number, since it is larger than the sum of its proper divisors (80024979).

123442221 is a wasteful number, since it uses less digits than its factorization.

123442221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 451 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 123442221 is about 11110.4554812123. The cubic root of 123442221 is about 497.9142729163.

Adding to 123442221 its reverse (122244321), we get a palindrome (245686542).

The spelling of 123442221 in words is "one hundred twenty-three million, four hundred forty-two thousand, two hundred twenty-one".