212212221220 has 96 divisors (see below), whose sum is σ = 455111395200. Its totient is φ = 83103820800.

The previous prime is 212212221203. The next prime is 212212221223. The reversal of 212212221220 is 22122212212.

It is not an unprimeable number, because it can be changed into a prime (212212221223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153664930 + ... + 153666310.

It is an arithmetic number, because the mean of its divisors is an integer number (4740743700).

Almost surely, 2^212212221220 is an apocalyptic number.

212212221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212212221220 is an abundant number, since it is smaller than the sum of its proper divisors (242899173980).

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

212212221220 is a wasteful number, since it uses less digits than its factorization.

212212221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269 (or 2267 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 212212221220 its reverse (22122212212), we get a palindrome (234334433432).

The spelling of 212212221220 in words is "two hundred twelve billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty".