221002001000221 has 16 divisors (see below), whose sum is σ = 254543398341120. Its totient is φ = 187954659451440.

The previous prime is 221002001000219. The next prime is 221002001000239. The reversal of 221002001000221 is 122000100200122.

It is a happy number.

It is not a de Polignac number, because 221002001000221 - 2¹ = 221002001000219 is a prime.

It is a super-2 number, since 2×221002001000221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002001000821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66504775 + ... + 69748756.

It is an arithmetic number, because the mean of its divisors is an integer number (15908962396320).

Almost surely, 2^{221002001000221} is an apocalyptic number.

It is an amenable number.

221002001000221 is a deficient number, since it is larger than the sum of its proper divisors (33541397340899).

221002001000221 is a wasteful number, since it uses less digits than its factorization.

221002001000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136255344.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221002001000221 its reverse (122000100200122), we get a palindrome (343002101200343).

The spelling of 221002001000221 in words is "two hundred twenty-one trillion, two billion, one million, two hundred twenty-one", and thus it is an aban number.