221111201122212 has 96 divisors (see below), whose sum is σ = 549788559868800. Its totient is φ = 69038702924800.

The previous prime is 221111201122187. The next prime is 221111201122219. The reversal of 221111201122212 is 212221102111122.

It is not an unprimeable number, because it can be changed into a prime (221111201122219) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 40733739 + ... + 45841682.

It is an arithmetic number, because the mean of its divisors is an integer number (5726964165300).

Almost surely, 2^{221111201122212} is an apocalyptic number.

It is an amenable number.

221111201122212 is an abundant number, since it is smaller than the sum of its proper divisors (328677358746588).

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

221111201122212 is a wasteful number, since it uses less digits than its factorization.

221111201122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86575677 (or 86575675 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221111201122212 its reverse (212221102111122), we get a palindrome (433332303233334).

The spelling of 221111201122212 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred one million, one hundred twenty-two thousand, two hundred twelve".