11210121200220 has 96 divisors (see below), whose sum is σ = 31743420609600. Its totient is φ = 2955553480704.

The previous prime is 11210121200191. The next prime is 11210121200279. The reversal of 11210121200220 is 2200212101211.

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 11210121200220.

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, 77555376 + ... + 77699784.

It is an arithmetic number, because the mean of its divisors is an integer number (330660631350).

Almost surely, 2^{11210121200220} is an apocalyptic number.

11210121200220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11210121200220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15871710304800).

11210121200220 is an abundant number, since it is smaller than the sum of its proper divisors (20533299409380).

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

11210121200220 is a wasteful number, since it uses less digits than its factorization.

11210121200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159047 (or 159045 counting only the distinct ones).

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

Adding to 11210121200220 its reverse (2200212101211), we get a palindrome (13410333301431).

Subtracting from 11210121200220 its reverse (2200212101211), we obtain a palindrome (9009909099009).

It can be divided in two parts, 1121012 and 1200220, that added together give a palindrome (2321232).

The spelling of 11210121200220 in words is "eleven trillion, two hundred ten billion, one hundred twenty-one million, two hundred thousand, two hundred twenty".