221002202052 has 144 divisors (see below), whose sum is σ = 597007756800. Its totient is φ = 68779952640.

The previous prime is 221002202009. The next prime is 221002202053. The reversal of 221002202052 is 250202200122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221002202053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79581688 + ... + 79584464.

It is an arithmetic number, because the mean of its divisors is an integer number (4145887200).

Almost surely, 2^221002202052 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221002202052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298503878400).

221002202052 is an abundant number, since it is smaller than the sum of its proper divisors (376005554748).

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

221002202052 is a wasteful number, since it uses less digits than its factorization.

221002202052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306 (or 5301 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 221002202052 its reverse (250202200122), we get a palindrome (471204402174).

The spelling of 221002202052 in words is "two hundred twenty-one billion, two million, two hundred two thousand, fifty-two".