11101321220 has 96 divisors (see below), whose sum is σ = 27453323520. Its totient is φ = 3728130560.

The previous prime is 11101321211. The next prime is 11101321229. The reversal of 11101321220 is 2212310111.

It is an interprime number because it is at equal distance from previous prime (11101321211) and next prime (11101321229).

It is a junction number, because it is equal to n+sod(n) for n = 11101321195 and 11101321204.

It is not an unprimeable number, because it can be changed into a prime (11101321229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108914 + ... + 184566.

It is an arithmetic number, because the mean of its divisors is an integer number (285972120).

Almost surely, 2^11101321220 is an apocalyptic number.

11101321220 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 11101321220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13726661760).

11101321220 is an abundant number, since it is smaller than the sum of its proper divisors (16352002300).

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

11101321220 is a wasteful number, since it uses less digits than its factorization.

11101321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75725 (or 75723 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11101321220 its reverse (2212310111), we get a palindrome (13313631331).

The spelling of 11101321220 in words is "eleven billion, one hundred one million, three hundred twenty-one thousand, two hundred twenty".