11201221012220 has 24 divisors (see below), whose sum is σ = 24906244369104. Its totient is φ = 4216930263296.

The previous prime is 11201221012211. The next prime is 11201221012229. The reversal of 11201221012220 is 2221012210211.

It is an interprime number because it is at equal distance from previous prime (11201221012211) and next prime (11201221012229).

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201221012229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16472383502 + ... + 16472384181.

It is an arithmetic number, because the mean of its divisors is an integer number (1037760182046).

Almost surely, 2^{11201221012220} is an apocalyptic number.

11201221012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11201221012220 is an abundant number, since it is smaller than the sum of its proper divisors (13705023356884).

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

11201221012220 is a wasteful number, since it uses less digits than its factorization.

11201221012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32944767709 (or 32944767707 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11201221012220 its reverse (2221012210211), we get a palindrome (13422233222431).

The spelling of 11201221012220 in words is "eleven trillion, two hundred one billion, two hundred twenty-one million, twelve thousand, two hundred twenty".