22221210 has 96 divisors (see below), whose sum is σ = 62068032. Its totient is φ = 5048320.

The previous prime is 22221209. The next prime is 22221211. The reversal of 22221210 is 1212222.

It is an interprime number because it is at equal distance from previous prime (22221209) and next prime (22221211).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22221211) 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 47 ways as a sum of consecutive naturals, for example, 95254 + ... + 95486.

It is an arithmetic number, because the mean of its divisors is an integer number (646542).

Almost surely, 2^22221210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31034016).

22221210 is an abundant number, since it is smaller than the sum of its proper divisors (39846822).

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

22221210 is a wasteful number, since it uses less digits than its factorization.

22221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22221210 is about 4713.9378443081. The cubic root of 22221210 is about 281.1399529960.

Adding to 22221210 its reverse (1212222), we get a palindrome (23433432).

It can be divided in two parts, 222212 and 10, that added together give a palindrome (222222).

The spelling of 22221210 in words is "twenty-two million, two hundred twenty-one thousand, two hundred ten".