11011211222220 has 96 divisors (see below), whose sum is σ = 37371383562240. Its totient is φ = 2669384537280.

The previous prime is 11011211222197. The next prime is 11011211222227. The reversal of 11011211222220 is 2222211211011.

11011211222220 is a `hidden beast` number, since 1 + 1 + 0 + 11 + 211 + 222 + 220 = 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 = 11011211222193 and 11011211222202.

It is not an unprimeable number, because it can be changed into a prime (11011211222227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 926863692 + ... + 926875571.

It is an arithmetic number, because the mean of its divisors is an integer number (389285245440).

Almost surely, 2^{11011211222220} is an apocalyptic number.

11011211222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011211222220 is an abundant number, since it is smaller than the sum of its proper divisors (26360172340020).

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

11011211222220 is a wasteful number, since it uses less digits than its factorization.

11011211222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853739292 (or 1853739284 counting only the distinct ones).

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

Adding to 11011211222220 its reverse (2222211211011), we get a palindrome (13233422433231).

The spelling of 11011211222220 in words is "eleven trillion, eleven billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty".