11201220001220 has 48 divisors (see below), whose sum is σ = 23665083458688. Its totient is φ = 4453344840960.

The previous prime is 11201220001133. The next prime is 11201220001253. The reversal of 11201220001220 is 2210002210211.

It is a junction number, because it is equal to n+sod(n) for n = 11201220001195 and 11201220001204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50527139 + ... + 50748341.

It is an arithmetic number, because the mean of its divisors is an integer number (493022572056).

Almost surely, 2^{11201220001220} is an apocalyptic number.

11201220001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11201220001220 is an abundant number, since it is smaller than the sum of its proper divisors (12463863457468).

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

11201220001220 is a wasteful number, since it uses less digits than its factorization.

11201220001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236540 (or 236538 counting only the distinct ones).

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

Adding to 11201220001220 its reverse (2210002210211), we get a palindrome (13411222211431).

The spelling of 11201220001220 in words is "eleven trillion, two hundred one billion, two hundred twenty million, one thousand, two hundred twenty".