22321212312 has 128 divisors (see below), whose sum is σ = 68077670400. Its totient is φ = 5956675200.

The previous prime is 22321212301. The next prime is 22321212349. The reversal of 22321212312 is 21321212322.

It is a super-3 number, since 3×22321212312³ (a number of 32 digits) contains 333 as substring.

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 an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 177387 + ... + 275877.

It is an arithmetic number, because the mean of its divisors is an integer number (531856800).

Almost surely, 2^22321212312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22321212312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34038835200).

22321212312 is an abundant number, since it is smaller than the sum of its proper divisors (45756458088).

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

22321212312 is a wasteful number, since it uses less digits than its factorization.

22321212312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98597 (or 98593 counting only the distinct ones).

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

Adding to 22321212312 its reverse (21321212322), we get a palindrome (43642424634).

The spelling of 22321212312 in words is "twenty-two billion, three hundred twenty-one million, two hundred twelve thousand, three hundred twelve".