212423117 has 2 divisors, whose sum is σ = 212423118. Its totient is φ = 212423116.

The previous prime is 212423089. The next prime is 212423119. The reversal of 212423117 is 711324212.

212423117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127893481 + 84529636 = 11309^2 + 9194^2 .

It is a cyclic number.

It is not a de Polignac number, because 212423117 - 2¹² = 212419021 is a prime.

Together with 212423119, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 212423092 and 212423101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212423119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106211558 + 106211559.

It is an arithmetic number, because the mean of its divisors is an integer number (106211559).

Almost surely, 2^212423117 is an apocalyptic number.

It is an amenable number.

212423117 is a deficient number, since it is larger than the sum of its proper divisors (1).

212423117 is an equidigital number, since it uses as much as digits as its factorization.

212423117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 23.

The square root of 212423117 is about 14574.7424334017. The cubic root of 212423117 is about 596.6696197781.

Adding to 212423117 its reverse (711324212), we get a palindrome (923747329).

The spelling of 212423117 in words is "two hundred twelve million, four hundred twenty-three thousand, one hundred seventeen".