11110222121220 has 144 divisors (see below), whose sum is σ = 34039658802240. Its totient is φ = 2932962912000.

The previous prime is 11110222121191. The next prime is 11110222121221. The reversal of 11110222121220 is 2212122201111.

11110222121220 is a `hidden beast` number, since 111 + 102 + 221 + 212 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11110222121193 and 11110222121202.

It is not an unprimeable number, because it can be changed into a prime (11110222121221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135563655 + ... + 135645585.

It is an arithmetic number, because the mean of its divisors is an integer number (236386519460).

Almost surely, 2^{11110222121220} is an apocalyptic number.

11110222121220 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 11110222121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17019829401120).

11110222121220 is an abundant number, since it is smaller than the sum of its proper divisors (22929436681020).

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

11110222121220 is a wasteful number, since it uses less digits than its factorization.

11110222121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89506 (or 89501 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11110222121220 its reverse (2212122201111), we get a palindrome (13322344322331).

The spelling of 11110222121220 in words is "eleven trillion, one hundred ten billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty".