211222221201220 has 24 divisors (see below), whose sum is σ = 443571081508800. Its totient is φ = 84488047149792.

The previous prime is 211222221201179. The next prime is 211222221201221. The reversal of 211222221201220 is 22102122222112.

It is a super-2 number, since 2×211222221201220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211222221201191 and 211222221201200.

It is not an unprimeable number, because it can be changed into a prime (211222221201221) 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, 50522530 + ... + 54543289.

It is an arithmetic number, because the mean of its divisors is an integer number (18482128396200).

Almost surely, 2^{211222221201220} is an apocalyptic number.

211222221201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211222221201220 is an abundant number, since it is smaller than the sum of its proper divisors (232348860307580).

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

211222221201220 is a wasteful number, since it uses less digits than its factorization.

211222221201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105166347 (or 105166345 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 211222221201220 its reverse (22102122222112), we get a palindrome (233324343423332).

The spelling of 211222221201220 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty".