23220021212 has 12 divisors (see below), whose sum is σ = 40734392160. Its totient is φ = 11581623456.

The previous prime is 23220021211. The next prime is 23220021229. The reversal of 23220021212 is 21212002232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7094948 + ... + 7098219.

It is an arithmetic number, because the mean of its divisors is an integer number (3394532680).

Almost surely, 2^23220021212 is an apocalyptic number.

It is an amenable number.

23220021212 is a deficient number, since it is larger than the sum of its proper divisors (17514370948).

23220021212 is a wasteful number, since it uses less digits than its factorization.

23220021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14193580 (or 14193578 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 23220021212 its reverse (21212002232), we get a palindrome (44432023444).

The spelling of 23220021212 in words is "twenty-three billion, two hundred twenty million, twenty-one thousand, two hundred twelve".