211200100121220 has 96 divisors (see below), whose sum is σ = 675871398494208. Its totient is φ = 48272088734592.

The previous prime is 211200100121203. The next prime is 211200100121243. The reversal of 211200100121220 is 22121001002112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211200100121220.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2408772 + ... + 20693051.

It is an arithmetic number, because the mean of its divisors is an integer number (7040327067648).

Almost surely, 2^{211200100121220} is an apocalyptic number.

211200100121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211200100121220 is an abundant number, since it is smaller than the sum of its proper divisors (464671298372988).

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

211200100121220 is a wasteful number, since it uses less digits than its factorization.

211200100121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23123609 (or 23123607 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211200100121220 its reverse (22121001002112), we get a palindrome (233321101123332).

The spelling of 211200100121220 in words is "two hundred eleven trillion, two hundred billion, one hundred million, one hundred twenty-one thousand, two hundred twenty".