23221213212 has 24 divisors (see below), whose sum is σ = 54791629200. Its totient is φ = 7653433216.

The previous prime is 23221213187. The next prime is 23221213229. The reversal of 23221213212 is 21231212232.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10870287 + ... + 10872422.

It is an arithmetic number, because the mean of its divisors is an integer number (2282984550).

Almost surely, 2^23221213212 is an apocalyptic number.

It is an amenable number.

23221213212 is an abundant number, since it is smaller than the sum of its proper divisors (31570415988).

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

23221213212 is a wasteful number, since it uses less digits than its factorization.

23221213212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21742805 (or 21742803 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

Adding to 23221213212 its reverse (21231212232), we get a palindrome (44452425444).

The spelling of 23221213212 in words is "twenty-three billion, two hundred twenty-one million, two hundred thirteen thousand, two hundred twelve".