211022212111220 has 144 divisors (see below), whose sum is σ = 511183839817728. Its totient is φ = 72834590223360.

The previous prime is 211022212111037. The next prime is 211022212111231. The reversal of 211022212111220 is 22111212220112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 211022212111192 and 211022212111201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23925092 + ... + 31534971.

It is an arithmetic number, because the mean of its divisors is an integer number (3549887776512).

Almost surely, 2^{211022212111220} is an apocalyptic number.

211022212111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211022212111220 is an abundant number, since it is smaller than the sum of its proper divisors (300161627706508).

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

211022212111220 is a wasteful number, since it uses less digits than its factorization.

211022212111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55460158 (or 55460137 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211022212111220 its reverse (22111212220112), we get a palindrome (233133424331332).

The spelling of 211022212111220 in words is "two hundred eleven trillion, twenty-two billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty".