221242202 has 8 divisors (see below), whose sum is σ = 333977556. Its totient is φ = 109916352.

The previous prime is 221242201. The next prime is 221242211. The reversal of 221242202 is 202242122.

It can be written as a sum of positive squares in 2 ways, for example, as 194295721 + 26946481 = 13939^2 + 5191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×221242202² = 97896223891617608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221242201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351983 + ... + 352610.

Almost surely, 2^221242202 is an apocalyptic number.

221242202 is a deficient number, since it is larger than the sum of its proper divisors (112735354).

221242202 is a wasteful number, since it uses less digits than its factorization.

221242202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704752.

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

The square root of 221242202 is about 14874.2126514313. The cubic root of 221242202 is about 604.8151446714.

Adding to 221242202 its reverse (202242122), we get a palindrome (423484324).

The spelling of 221242202 in words is "two hundred twenty-one million, two hundred forty-two thousand, two hundred two".