23121222 has 8 divisors (see below), whose sum is σ = 46242456. Its totient is φ = 7707072.

The previous prime is 23121209. The next prime is 23121247. The reversal of 23121222 is 22212132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

23121222 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1926763 + ... + 1926774.

It is an arithmetic number, because the mean of its divisors is an integer number (5780307).

Almost surely, 2^23121222 is an apocalyptic number.

23121222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23121222 is a wasteful number, since it uses less digits than its factorization.

23121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853542.

The product of its digits is 96, while the sum is 15.

The square root of 23121222 is about 4808.4531816375. The cubic root of 23121222 is about 284.8854448813.

Adding to 23121222 its reverse (22212132), we get a palindrome (45333354).

The spelling of 23121222 in words is "twenty-three million, one hundred twenty-one thousand, two hundred twenty-two".