221111111202 has 32 divisors (see below), whose sum is σ = 461472370560. Its totient is φ = 70495666560.

The previous prime is 221111111197. The next prime is 221111111237. The reversal of 221111111202 is 202111111122.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 5192574 + ... + 5234982.

It is an arithmetic number, because the mean of its divisors is an integer number (14421011580).

Almost surely, 2^221111111202 is an apocalyptic number.

221111111202 is an abundant number, since it is smaller than the sum of its proper divisors (240361259358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221111111202 is a wasteful number, since it uses less digits than its factorization.

221111111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80218.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221111111202 its reverse (202111111122), we get a palindrome (423222222324).

It can be divided in two parts, 22111111120 and 2, that added together give a palindrome (22111111122).

The spelling of 221111111202 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred eleven thousand, two hundred two".