221605122202 has 16 divisors (see below), whose sum is σ = 344151296640. Its totient is φ = 106894274032.

The previous prime is 221605122181. The next prime is 221605122203. The reversal of 221605122202 is 202221506122.

It is not an unprimeable number, because it can be changed into a prime (221605122203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1491118 + ... + 1632985.

It is an arithmetic number, because the mean of its divisors is an integer number (21509456040).

Almost surely, 2^221605122202 is an apocalyptic number.

221605122202 is a deficient number, since it is larger than the sum of its proper divisors (122546174438).

221605122202 is a wasteful number, since it uses less digits than its factorization.

221605122202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125357.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 221605122202 its reverse (202221506122), we get a palindrome (423826628324).

The spelling of 221605122202 in words is "two hundred twenty-one billion, six hundred five million, one hundred twenty-two thousand, two hundred two".