23121212 has 12 divisors (see below), whose sum is σ = 41449296. Its totient is φ = 11278560.

The previous prime is 23121209. The next prime is 23121247. The reversal of 23121212 is 21212132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70328 + ... + 70655.

It is an arithmetic number, because the mean of its divisors is an integer number (3454108).

Almost surely, 2^23121212 is an apocalyptic number.

It is an amenable number.

23121212 is a deficient number, since it is larger than the sum of its proper divisors (18328084).

23121212 is a wasteful number, since it uses less digits than its factorization.

23121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141028 (or 141026 counting only the distinct ones).

The product of its digits is 48, while the sum is 14.

The square root of 23121212 is about 4808.4521418020. The cubic root of 23121212 is about 284.8854038100.

Adding to 23121212 its reverse (21212132), we get a palindrome (44333344).

The spelling of 23121212 in words is "twenty-three million, one hundred twenty-one thousand, two hundred twelve".