221002001222 has 16 divisors (see below), whose sum is σ = 332559989712. Its totient is φ = 110148783360.

The previous prime is 221002001173. The next prime is 221002001237. The reversal of 221002001222 is 222100200122.

It is a junction number, because it is equal to n+sod(n) for n = 221002001197 and 221002001206.

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, 4499018 + ... + 4547874.

It is an arithmetic number, because the mean of its divisors is an integer number (20784999357).

Almost surely, 2^221002001222 is an apocalyptic number.

221002001222 is a deficient number, since it is larger than the sum of its proper divisors (111557988490).

221002001222 is a wasteful number, since it uses less digits than its factorization.

221002001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56023.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221002001222 its reverse (222100200122), we get a palindrome (443102201344).

It can be divided in two parts, 22100200122 and 2, that multiplied together give a palindrome (44200400244).

The spelling of 221002001222 in words is "two hundred twenty-one billion, two million, one thousand, two hundred twenty-two".