221021323202 has 16 divisors (see below), whose sum is σ = 363138483960. Its totient is φ = 100423481088.

The previous prime is 221021323189. The next prime is 221021323277. The reversal of 221021323202 is 202323120122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 159104456641 + 61916866561 = 398879^2 + 248831^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112078793 + ... + 112080764.

Almost surely, 2^221021323202 is an apocalyptic number.

221021323202 is a deficient number, since it is larger than the sum of its proper divisors (142117160758).

221021323202 is a wasteful number, since it uses less digits than its factorization.

221021323202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224159605.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221021323202 its reverse (202323120122), we get a palindrome (423344443324).

The spelling of 221021323202 in words is "two hundred twenty-one billion, twenty-one million, three hundred twenty-three thousand, two hundred two".