221111100202 has 16 divisors (see below), whose sum is σ = 351300565512. Its totient is φ = 104015508480.

The previous prime is 221111100191. The next prime is 221111100227. The reversal of 221111100202 is 202001111122.

It can be written as a sum of positive squares in 4 ways, for example, as 220044489921 + 1066610281 = 469089^2 + 32659^2 .

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 7 ways as a sum of consecutive naturals, for example, 1051449 + ... + 1244092.

Almost surely, 2^221111100202 is an apocalyptic number.

221111100202 is a deficient number, since it is larger than the sum of its proper divisors (130189465310).

221111100202 is a wasteful number, since it uses less digits than its factorization.

221111100202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298393.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221111100202 its reverse (202001111122), we get a palindrome (423112211324).

The spelling of 221111100202 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred thousand, two hundred two".