123245221 has 8 divisors (see below), whose sum is σ = 137729088. Its totient is φ = 109308000.

The previous prime is 123245209. The next prime is 123245249. The reversal of 123245221 is 122542321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123245221 - 2¹¹ = 123243173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123245192 and 123245201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123245021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136185 + ... + 137086.

It is an arithmetic number, because the mean of its divisors is an integer number (17216136).

Almost surely, 2^123245221 is an apocalyptic number.

123245221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123245221 is a deficient number, since it is larger than the sum of its proper divisors (14483867).

123245221 is a wasteful number, since it uses less digits than its factorization.

123245221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273323.

The product of its digits is 960, while the sum is 22.

The square root of 123245221 is about 11101.5864181656. The cubic root of 123245221 is about 497.6492600300.

Adding to 123245221 its reverse (122542321), we get a palindrome (245787542).

The spelling of 123245221 in words is "one hundred twenty-three million, two hundred forty-five thousand, two hundred twenty-one".