123211117 has 2 divisors, whose sum is σ = 123211118. Its totient is φ = 123211116.

The previous prime is 123211063. The next prime is 123211141. The reversal of 123211117 is 711112321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80622441 + 42588676 = 8979^2 + 6526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123211117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123211094 and 123211103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123211177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61605558 + 61605559.

It is an arithmetic number, because the mean of its divisors is an integer number (61605559).

Almost surely, 2^123211117 is an apocalyptic number.

It is an amenable number.

123211117 is a deficient number, since it is larger than the sum of its proper divisors (1).

123211117 is an equidigital number, since it uses as much as digits as its factorization.

123211117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84, while the sum is 19.

The square root of 123211117 is about 11100.0503152013. The cubic root of 123211117 is about 497.6033531896.

Adding to 123211117 its reverse (711112321), we get a palindrome (834323438).

The spelling of 123211117 in words is "one hundred twenty-three million, two hundred eleven thousand, one hundred seventeen".