211200111220220 has 96 divisors (see below), whose sum is σ = 480465910417920. Its totient is φ = 77710751481600.

The previous prime is 211200111220207. The next prime is 211200111220229. The reversal of 211200111220220 is 22022111002112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211200111220229) 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, 8575106 + ... + 22269545.

It is an arithmetic number, because the mean of its divisors is an integer number (5004853233520).

Almost surely, 2^{211200111220220} is an apocalyptic number.

211200111220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211200111220220 is an abundant number, since it is smaller than the sum of its proper divisors (269265799197700).

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

211200111220220 is a wasteful number, since it uses less digits than its factorization.

211200111220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30845203 (or 30845201 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211200111220220 its reverse (22022111002112), we get a palindrome (233222222222332).

The spelling of 211200111220220 in words is "two hundred eleven trillion, two hundred billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty".