221002202222120 has 128 divisors (see below), whose sum is σ = 545260616841600. Its totient is φ = 79949594188800.

The previous prime is 221002202222099. The next prime is 221002202222189. The reversal of 221002202222120 is 21222202200122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221002202222092 and 221002202222101.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1063373015 + ... + 1063580825.

It is an arithmetic number, because the mean of its divisors is an integer number (4259848569075).

Almost surely, 2^{221002202222120} is an apocalyptic number.

221002202222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221002202222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272630308420800).

221002202222120 is an abundant number, since it is smaller than the sum of its proper divisors (324258414619480).

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

221002202222120 is a wasteful number, since it uses less digits than its factorization.

221002202222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220299 (or 220295 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 221002202222120 its reverse (21222202200122), we get a palindrome (242224404422242).

The spelling of 221002202222120 in words is "two hundred twenty-one trillion, two billion, two hundred two million, two hundred twenty-two thousand, one hundred twenty".