221002222012221 has 32 divisors (see below), whose sum is σ = 317409045262848. Its totient is φ = 135970290616320.

The previous prime is 221002222012147. The next prime is 221002222012241. The reversal of 221002222012221 is 122210222200122.

It is not a de Polignac number, because 221002222012221 - 2²⁵ = 221002188457789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002222012241) 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 31 ways as a sum of consecutive naturals, for example, 3756531276 + ... + 3756590106.

It is an arithmetic number, because the mean of its divisors is an integer number (9919032664464).

Almost surely, 2^{221002222012221} is an apocalyptic number.

It is an amenable number.

221002222012221 is a deficient number, since it is larger than the sum of its proper divisors (96406823250627).

221002222012221 is a wasteful number, since it uses less digits than its factorization.

221002222012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79221.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221002222012221 its reverse (122210222200122), we get a palindrome (343212444212343).

The spelling of 221002222012221 in words is "two hundred twenty-one trillion, two billion, two hundred twenty-two million, twelve thousand, two hundred twenty-one".