212222213220 has 24 divisors (see below), whose sum is σ = 594222197184. Its totient is φ = 56592590176.

The previous prime is 212222213213. The next prime is 212222213243. The reversal of 212222213220 is 22312222212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1768518384 + ... + 1768518503.

It is an arithmetic number, because the mean of its divisors is an integer number (24759258216).

Almost surely, 2^212222213220 is an apocalyptic number.

212222213220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212222213220 is an abundant number, since it is smaller than the sum of its proper divisors (381999983964).

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

212222213220 is a wasteful number, since it uses less digits than its factorization.

212222213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3537036899 (or 3537036897 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 212222213220 its reverse (22312222212), we get a palindrome (234534435432).

The spelling of 212222213220 in words is "two hundred twelve billion, two hundred twenty-two million, two hundred thirteen thousand, two hundred twenty".