212221133310 has 128 divisors (see below), whose sum is σ = 529647206400. Its totient is φ = 54363225600.

The previous prime is 212221133303. The next prime is 212221133317. The reversal of 212221133310 is 13331122212.

It is an interprime number because it is at equal distance from previous prime (212221133303) and next prime (212221133317).

It is a super-2 number, since 2×212221133310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221133317) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 108886216 + ... + 108888164.

It is an arithmetic number, because the mean of its divisors is an integer number (4137868800).

Almost surely, 2^212221133310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212221133310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264823603200).

212221133310 is an abundant number, since it is smaller than the sum of its proper divisors (317426073090).

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

212221133310 is a wasteful number, since it uses less digits than its factorization.

212221133310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 212221133310 its reverse (13331122212), we get a palindrome (225552255522).

The spelling of 212221133310 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred thirty-three thousand, three hundred ten".