11112122201220 has 288 divisors, whose sum is σ = 35435446126080. Its totient is φ = 2815092403200.

The previous prime is 11112122201209. The next prime is 11112122201231. The reversal of 11112122201220 is 2210222121111.

11112122201220 is a `hidden beast` number, since 1 + 1 + 11 + 212 + 220 + 1 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (11112122201209) and next prime (11112122201231).

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 = 11112122201193 and 11112122201202.

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 95 ways as a sum of consecutive naturals, for example, 1122318270 + ... + 1122328170.

Almost surely, 2^{11112122201220} is an apocalyptic number.

11112122201220 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 11112122201220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17717723063040).

11112122201220 is an abundant number, since it is smaller than the sum of its proper divisors (24323323924860).

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

11112122201220 is a wasteful number, since it uses less digits than its factorization.

11112122201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13915 (or 13910 counting only the distinct ones).

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

Adding to 11112122201220 its reverse (2210222121111), we get a palindrome (13322344322331).

The spelling of 11112122201220 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-two million, two hundred one thousand, two hundred twenty".