23201212217 has 2 divisors, whose sum is σ = 23201212218. Its totient is φ = 23201212216.

The previous prime is 23201212147. The next prime is 23201212219. The reversal of 23201212217 is 71221210232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22517703481 + 683508736 = 150059^2 + 26144^2 .

It is a cyclic number.

It is not a de Polignac number, because 23201212217 - 2¹⁴ = 23201195833 is a prime.

Together with 23201212219, 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 = 23201212192 and 23201212201.

It is not a weakly prime, because it can be changed into another prime (23201212219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11600606108 + 11600606109.

It is an arithmetic number, because the mean of its divisors is an integer number (11600606109).

Almost surely, 2^23201212217 is an apocalyptic number.

It is an amenable number.

23201212217 is a deficient number, since it is larger than the sum of its proper divisors (1).

23201212217 is an equidigital number, since it uses as much as digits as its factorization.

23201212217 is an evil number, because the sum of its binary digits is even.

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

Adding to 23201212217 its reverse (71221210232), we get a palindrome (94422422449).

The spelling of 23201212217 in words is "twenty-three billion, two hundred one million, two hundred twelve thousand, two hundred seventeen".