221202220202 has 16 divisors (see below), whose sum is σ = 353885568840. Its totient is φ = 103335341568.

The previous prime is 221202220193. The next prime is 221202220237. The reversal of 221202220202 is 202022202122.

It can be written as a sum of positive squares in 4 ways, for example, as 221117193361 + 85026841 = 470231^2 + 9221^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 23739677 + ... + 23748992.

Almost surely, 2^221202220202 is an apocalyptic number.

221202220202 is a deficient number, since it is larger than the sum of its proper divisors (132683348638).

221202220202 is a wasteful number, since it uses less digits than its factorization.

221202220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47488825.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 221202220202 its reverse (202022202122), we get a palindrome (423224422324).

The spelling of 221202220202 in words is "two hundred twenty-one billion, two hundred two million, two hundred twenty thousand, two hundred two".