11221212110220 has 108 divisors (see below), whose sum is σ = 39594848477184. Its totient is φ = 2564848480320.

The previous prime is 11221212110203. The next prime is 11221212110221. The reversal of 11221212110220 is 2201121212211.

11221212110220 is a `hidden beast` number, since 1 + 1 + 221 + 212 + 1 + 10 + 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 = 11221212110193 and 11221212110202.

It is not an unprimeable number, because it can be changed into a prime (11221212110221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 636114316 + ... + 636131955.

Almost surely, 2^{11221212110220} is an apocalyptic number.

11221212110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221212110220 is an abundant number, since it is smaller than the sum of its proper divisors (28373636366964).

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

11221212110220 is a wasteful number, since it uses less digits than its factorization.

11221212110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272246300 (or 1272246288 counting only the distinct ones).

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

Adding to 11221212110220 its reverse (2201121212211), we get a palindrome (13422333322431).

The spelling of 11221212110220 in words is "eleven trillion, two hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, two hundred twenty".