1101220221220 has 48 divisors (see below), whose sum is σ = 2657530407168. Its totient is φ = 375475236480.

The previous prime is 1101220221163. The next prime is 1101220221239. The reversal of 1101220221220 is 221220221011.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1101220221194 and 1101220221203.

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, 21703552 + ... + 21754231.

It is an arithmetic number, because the mean of its divisors is an integer number (55365216816).

Almost surely, 2^{1101220221220} is an apocalyptic number.

1101220221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101220221220 is an abundant number, since it is smaller than the sum of its proper divisors (1556310185948).

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

1101220221220 is a wasteful number, since it uses less digits than its factorization.

1101220221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43457980 (or 43457978 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1101220221220 its reverse (221220221011), we get a palindrome (1322440442231).

The spelling of 1101220221220 in words is "one trillion, one hundred one billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty".