221111220202 has 16 divisors (see below), whose sum is σ = 336388288392. Its totient is φ = 108991187200.

The previous prime is 221111220193. The next prime is 221111220221. The reversal of 221111220202 is 202022111122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 203510156641 + 17601063561 = 451121^2 + 132669^2 .

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, 2301883 + ... + 2396014.

Almost surely, 2^221111220202 is an apocalyptic number.

221111220202 is a deficient number, since it is larger than the sum of its proper divisors (115277068190).

221111220202 is a wasteful number, since it uses less digits than its factorization.

221111220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4698233.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221111220202 its reverse (202022111122), we get a palindrome (423133331324).

The spelling of 221111220202 in words is "two hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, two hundred two".