221221432230202 has 8 divisors (see below), whose sum is σ = 351351686483316. Its totient is φ = 104104203402432.

The previous prime is 221221432230179. The next prime is 221221432230299. The reversal of 221221432230202 is 202032234122122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 208566771469281 + 12654660760921 = 14441841^2 + 3557339^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3253256356293 + ... + 3253256356360.

Almost surely, 2^{221221432230202} is an apocalyptic number.

221221432230202 is a deficient number, since it is larger than the sum of its proper divisors (130130254253114).

221221432230202 is a wasteful number, since it uses less digits than its factorization.

221221432230202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6506512712672.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 221221432230202 its reverse (202032234122122), we get a palindrome (423253666352324).

The spelling of 221221432230202 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, four hundred thirty-two million, two hundred thirty thousand, two hundred two".