23212117 has 4 divisors (see below), whose sum is σ = 23300640. Its totient is φ = 23123596.

The previous prime is 23212099. The next prime is 23212139. The reversal of 23212117 is 71121232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23212117 - 2⁷ = 23211989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23212094 and 23212103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23212177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43867 + ... + 44392.

It is an arithmetic number, because the mean of its divisors is an integer number (5825160).

Almost surely, 2^23212117 is an apocalyptic number.

It is an amenable number.

23212117 is a deficient number, since it is larger than the sum of its proper divisors (88523).

23212117 is an equidigital number, since it uses as much as digits as its factorization.

23212117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88522.

The product of its digits is 168, while the sum is 19.

The square root of 23212117 is about 4817.8954949231. The cubic root of 23212117 is about 285.2582741338.

Adding to 23212117 its reverse (71121232), we get a palindrome (94333349).

The spelling of 23212117 in words is "twenty-three million, two hundred twelve thousand, one hundred seventeen".