221100222111002 has 8 divisors (see below), whose sum is σ = 357161897256276. Its totient is φ = 102046256358912.

The previous prime is 221100222110813. The next prime is 221100222111017. The reversal of 221100222111002 is 200111222001122.

It can be written as a sum of positive squares in 2 ways, for example, as 175583462125681 + 45516759985321 = 13250791^2 + 6746611^2 .

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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4251927348263 + ... + 4251927348314.

Almost surely, 2^{221100222111002} is an apocalyptic number.

221100222111002 is a deficient number, since it is larger than the sum of its proper divisors (136061675145274).

221100222111002 is a wasteful number, since it uses less digits than its factorization.

221100222111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8503854696592.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221100222111002 its reverse (200111222001122), we get a palindrome (421211444112124).

The spelling of 221100222111002 in words is "two hundred twenty-one trillion, one hundred billion, two hundred twenty-two million, one hundred eleven thousand, two".