21120122202220 has 48 divisors (see below), whose sum is σ = 45268233218208. Its totient is φ = 8274135467520.

The previous prime is 21120122202181. The next prime is 21120122202253. The reversal of 21120122202220 is 2220222102112.

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, 16841889 + ... + 18052408.

It is an arithmetic number, because the mean of its divisors is an integer number (943088192046).

Almost surely, 2^{21120122202220} is an apocalyptic number.

21120122202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120122202220 is an abundant number, since it is smaller than the sum of its proper divisors (24148111015988).

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

21120122202220 is a wasteful number, since it uses less digits than its factorization.

21120122202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34894930 (or 34894928 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21120122202220 its reverse (2220222102112), we get a palindrome (23340344304332).

The spelling of 21120122202220 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty".