23221221222 has 128 divisors (see below), whose sum is σ = 52005888000. Its totient is φ = 6878995200.

The previous prime is 23221221217. The next prime is 23221221223. The reversal of 23221221222 is 22212212232.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221221223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35236729 + ... + 35237387.

It is an arithmetic number, because the mean of its divisors is an integer number (406296000).

Almost surely, 2^23221221222 is an apocalyptic number.

23221221222 is an abundant number, since it is smaller than the sum of its proper divisors (28784666778).

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

23221221222 is a wasteful number, since it uses less digits than its factorization.

23221221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946.

The product of its digits is 768, while the sum is 21.

Adding to 23221221222 its reverse (22212212232), we get a palindrome (45433433454).

The spelling of 23221221222 in words is "twenty-three billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".