23111212 has 12 divisors (see below), whose sum is σ = 40803336. Its totient is φ = 11453120.

The previous prime is 23111197. The next prime is 23111219. The reversal of 23111212 is 21211132.

It is a junction number, because it is equal to n+sod(n) for n = 23111192 and 23111201.

It is not an unprimeable number, because it can be changed into a prime (23111219) 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, 25114 + ... + 26017.

It is an arithmetic number, because the mean of its divisors is an integer number (3400278).

Almost surely, 2^23111212 is an apocalyptic number.

It is an amenable number.

23111212 is a deficient number, since it is larger than the sum of its proper divisors (17692124).

23111212 is a wasteful number, since it uses less digits than its factorization.

23111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51248 (or 51246 counting only the distinct ones).

The product of its digits is 24, while the sum is 13.

The square root of 23111212 is about 4807.4121936859. The cubic root of 23111212 is about 284.8443265970.

Adding to 23111212 its reverse (21211132), we get a palindrome (44322344).

The spelling of 23111212 in words is "twenty-three million, one hundred eleven thousand, two hundred twelve".