2011100221220 has 24 divisors (see below), whose sum is σ = 4225116168000. Its totient is φ = 804096144992.

The previous prime is 2011100221199. The next prime is 2011100221303. The reversal of 2011100221220 is 221220011102.

It is a super-2 number, since 2×2011100221220² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2011100221195 and 2011100221204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21448520 + ... + 21542079.

It is an arithmetic number, because the mean of its divisors is an integer number (176046507000).

Almost surely, 2^{2011100221220} is an apocalyptic number.

2011100221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011100221220 is an abundant number, since it is smaller than the sum of its proper divisors (2214015946780).

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

2011100221220 is a wasteful number, since it uses less digits than its factorization.

2011100221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42992947 (or 42992945 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2011100221220 its reverse (221220011102), we get a palindrome (2232320232322).

The spelling of 2011100221220 in words is "two trillion, eleven billion, one hundred million, two hundred twenty-one thousand, two hundred twenty".