211222221212120 has 32 divisors (see below), whose sum is σ = 475882820694720. Its totient is φ = 84376386624000.

The previous prime is 211222221212099. The next prime is 211222221212129. The reversal of 211222221212120 is 21212122222112.

It is a super-2 number, since 2×211222221212120² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222221212129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3515652737 + ... + 3515712816.

It is an arithmetic number, because the mean of its divisors is an integer number (14871338146710).

Almost surely, 2^{211222221212120} is an apocalyptic number.

211222221212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211222221212120 is an abundant number, since it is smaller than the sum of its proper divisors (264660599482600).

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

211222221212120 is a wasteful number, since it uses less digits than its factorization.

211222221212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7031366315 (or 7031366311 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 211222221212120 its reverse (21212122222112), we get a palindrome (232434343434232).

The spelling of 211222221212120 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty".