123217213 has 12 divisors (see below), whose sum is σ = 143818752. Its totient is φ = 105257880.

The previous prime is 123217181. The next prime is 123217217. The reversal of 123217213 is 312712321.

It is a happy number.

It is not a de Polignac number, because 123217213 - 2⁵ = 123217181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123217217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10948 + ... + 19138.

It is an arithmetic number, because the mean of its divisors is an integer number (11984896).

Almost surely, 2^123217213 is an apocalyptic number.

It is an amenable number.

123217213 is a deficient number, since it is larger than the sum of its proper divisors (20601539).

123217213 is an equidigital number, since it uses as much as digits as its factorization.

123217213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8512 (or 8505 counting only the distinct ones).

The product of its digits is 504, while the sum is 22.

The square root of 123217213 is about 11100.3249051548. The cubic root of 123217213 is about 497.6115595379.

Adding to 123217213 its reverse (312712321), we get a palindrome (435929534).

The spelling of 123217213 in words is "one hundred twenty-three million, two hundred seventeen thousand, two hundred thirteen".