22312213212 has 12 divisors (see below), whose sum is σ = 52061830856. Its totient is φ = 7437404400.

The previous prime is 22312213211. The next prime is 22312213229. The reversal of 22312213212 is 21231221322.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×22312213212³ (a number of 32 digits) contains 333 as substring.

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 (22312213211) 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 3 ways as a sum of consecutive naturals, for example, 929675539 + ... + 929675562.

Almost surely, 2^22312213212 is an apocalyptic number.

It is an amenable number.

22312213212 is an abundant number, since it is smaller than the sum of its proper divisors (29749617644).

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

22312213212 is a wasteful number, since it uses less digits than its factorization.

22312213212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859351108 (or 1859351106 counting only the distinct ones).

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

Adding to 22312213212 its reverse (21231221322), we get a palindrome (43543434534).

The spelling of 22312213212 in words is "twenty-two billion, three hundred twelve million, two hundred thirteen thousand, two hundred twelve".