11112101221220 has 96 divisors (see below), whose sum is σ = 24232326491520. Its totient is φ = 4275179919360.

The previous prime is 11112101221217. The next prime is 11112101221241. The reversal of 11112101221220 is 2212210121111.

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, 748635119 + ... + 748649961.

It is an arithmetic number, because the mean of its divisors is an integer number (252420067620).

Almost surely, 2^{11112101221220} is an apocalyptic number.

11112101221220 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 11112101221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12116163245760).

11112101221220 is an abundant number, since it is smaller than the sum of its proper divisors (13120225270300).

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

11112101221220 is a wasteful number, since it uses less digits than its factorization.

11112101221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19725 (or 19723 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11112101221220 its reverse (2212210121111), we get a palindrome (13324311342331).

The spelling of 11112101221220 in words is "eleven trillion, one hundred twelve billion, one hundred one million, two hundred twenty-one thousand, two hundred twenty".