11221201021220 has 24 divisors (see below), whose sum is σ = 23564779628544. Its totient is φ = 4488431363936.

The previous prime is 11221201021207. The next prime is 11221201021223. The reversal of 11221201021220 is 2212010212211.

It is not an unprimeable number, because it can be changed into a prime (11221201021223) 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, 1160282 + ... + 4877361.

It is an arithmetic number, because the mean of its divisors is an integer number (981865817856).

Almost surely, 2^{11221201021220} is an apocalyptic number.

11221201021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221201021220 is an abundant number, since it is smaller than the sum of its proper divisors (12343578607324).

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

11221201021220 is a wasteful number, since it uses less digits than its factorization.

11221201021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6130579 (or 6130577 counting only the distinct ones).

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

Adding to 11221201021220 its reverse (2212010212211), we get a palindrome (13433211233431).

It can be divided in two parts, 1 and 1221201021220, that added together give a palindrome (1221201021221).

The spelling of 11221201021220 in words is "eleven trillion, two hundred twenty-one billion, two hundred one million, twenty-one thousand, two hundred twenty".