23221312212 has 24 divisors (see below), whose sum is σ = 61923499456. Its totient is φ = 6634660608.

The previous prime is 23221312211. The next prime is 23221312237. The reversal of 23221312212 is 21221312232.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 (23221312211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138222013 + ... + 138222180.

Almost surely, 2^23221312212 is an apocalyptic number.

It is an amenable number.

23221312212 is an abundant number, since it is smaller than the sum of its proper divisors (38702187244).

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

23221312212 is a wasteful number, since it uses less digits than its factorization.

23221312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276444207 (or 276444205 counting only the distinct ones).

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

Adding to 23221312212 its reverse (21221312232), we get a palindrome (44442624444).

The spelling of 23221312212 in words is "twenty-three billion, two hundred twenty-one million, three hundred twelve thousand, two hundred twelve".