211122212012220 has 96 divisors (see below), whose sum is σ = 607617882704448. Its totient is φ = 54732643909632.

The previous prime is 211122212012219. The next prime is 211122212012263. The reversal of 211122212012220 is 22210212221112.

It is a super-2 number, since 2×211122212012220² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36369787 + ... + 41773266.

It is an arithmetic number, because the mean of its divisors is an integer number (6329352944838).

Almost surely, 2^{211122212012220} is an apocalyptic number.

211122212012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211122212012220 is an abundant number, since it is smaller than the sum of its proper divisors (396495670692228).

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

211122212012220 is a wasteful number, since it uses less digits than its factorization.

211122212012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78144319 (or 78144317 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211122212012220 its reverse (22210212221112), we get a palindrome (233332424233332).

The spelling of 211122212012220 in words is "two hundred eleven trillion, one hundred twenty-two billion, two hundred twelve million, twelve thousand, two hundred twenty".