11221220121100 has 72 divisors (see below), whose sum is σ = 27718631394048. Its totient is φ = 3903033076800.

The previous prime is 11221220121047. The next prime is 11221220121179. The reversal of 11221220121100 is 112102212211.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221737944 + ... + 221788543.

It is an arithmetic number, because the mean of its divisors is an integer number (384980991584).

Almost surely, 2^{11221220121100} is an apocalyptic number.

11221220121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221220121100 is an abundant number, since it is smaller than the sum of its proper divisors (16497411272948).

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

11221220121100 is a wasteful number, since it uses less digits than its factorization.

11221220121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443526535 (or 443526528 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11221220121100 its reverse (112102212211), we get a palindrome (11333322333311).

The spelling of 11221220121100 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred".