123221113 has 4 divisors (see below), whose sum is σ = 126226548. Its totient is φ = 120215680.

The previous prime is 123221071. The next prime is 123221129. The reversal of 123221113 is 311122321.

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 4149369 + 119071744 = 2037^2 + 10912^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123221113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123221173) 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, 1502656 + ... + 1502737.

It is an arithmetic number, because the mean of its divisors is an integer number (31556637).

Almost surely, 2^123221113 is an apocalyptic number.

It is an amenable number.

123221113 is a deficient number, since it is larger than the sum of its proper divisors (3005435).

123221113 is an equidigital number, since it uses as much as digits as its factorization.

123221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005434.

The product of its digits is 72, while the sum is 16.

The square root of 123221113 is about 11100.5005742984. The cubic root of 123221113 is about 497.6168095204.

Adding to 123221113 its reverse (311122321), we get a palindrome (434343434).

The spelling of 123221113 in words is "one hundred twenty-three million, two hundred twenty-one thousand, one hundred thirteen".