22321212 has 24 divisors (see below), whose sum is σ = 53491536. Its totient is φ = 7239168.

The previous prime is 22321183. The next prime is 22321217. The reversal of 22321212 is 21212322.

It is a happy number.

It is a super-3 number, since 3×22321212³ (a number of 23 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 22321191 and 22321200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22321217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24693 + ... + 25580.

It is an arithmetic number, because the mean of its divisors is an integer number (2228814).

Almost surely, 2^22321212 is an apocalyptic number.

It is an amenable number.

22321212 is an abundant number, since it is smaller than the sum of its proper divisors (31170324).

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

22321212 is a wasteful number, since it uses less digits than its factorization.

22321212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50317 (or 50315 counting only the distinct ones).

The product of its digits is 96, while the sum is 15.

The square root of 22321212 is about 4724.5329927941. The cubic root of 22321212 is about 281.5610594990.

Adding to 22321212 its reverse (21212322), we get a palindrome (43533534).

The spelling of 22321212 in words is "twenty-two million, three hundred twenty-one thousand, two hundred twelve".