221212222001222 has 16 divisors (see below), whose sum is σ = 331847653589712. Its totient is φ = 110596337903520.

The previous prime is 221212222001167. The next prime is 221212222001231. The reversal of 221212222001222 is 222100222212122.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 1391078588 + ... + 1391237600.

It is an arithmetic number, because the mean of its divisors is an integer number (20740478349357).

Almost surely, 2^{221212222001222} is an apocalyptic number.

221212222001222 is a deficient number, since it is larger than the sum of its proper divisors (110635431588490).

221212222001222 is a wasteful number, since it uses less digits than its factorization.

221212222001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216103.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221212222001222 its reverse (222100222212122), we get a palindrome (443312444213344).

The spelling of 221212222001222 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred twenty-two million, one thousand, two hundred twenty-two".