123222213 has 12 divisors (see below), whose sum is σ = 178389900. Its totient is φ = 81962496.

The previous prime is 123222199. The next prime is 123222217. The reversal of 123222213 is 312222321.

It can be written as a sum of positive squares in 2 ways, for example, as 36397089 + 86825124 = 6033^2 + 9318^2 .

It is not a de Polignac number, because 123222213 - 2¹⁸ = 122960069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123222217) 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 11 ways as a sum of consecutive naturals, for example, 11206 + ... + 19287.

It is an arithmetic number, because the mean of its divisors is an integer number (14865825).

Almost surely, 2^123222213 is an apocalyptic number.

It is an amenable number.

123222213 is a deficient number, since it is larger than the sum of its proper divisors (55167687).

123222213 is a wasteful number, since it uses less digits than its factorization.

123222213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30948 (or 30945 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 123222213 is about 11100.5501215030. The cubic root of 123222213 is about 497.6182902646.

Adding to 123222213 its reverse (312222321), we get a palindrome (435444534).

It can be divided in two parts, 12322 and 2213, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 123222213 in words is "one hundred twenty-three million, two hundred twenty-two thousand, two hundred thirteen".