222221002012221 has 4 divisors (see below), whose sum is σ = 296294669349632. Its totient is φ = 148147334674812.

The previous prime is 222221002012201. The next prime is 222221002012253. The reversal of 222221002012221 is 122210200122222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 222221002012221 - 2⁴⁵ = 187036629923389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221002012201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37036833668701 + ... + 37036833668706.

It is an arithmetic number, because the mean of its divisors is an integer number (74073667337408).

Almost surely, 2^{222221002012221} is an apocalyptic number.

It is an amenable number.

222221002012221 is a deficient number, since it is larger than the sum of its proper divisors (74073667337411).

222221002012221 is an equidigital number, since it uses as much as digits as its factorization.

222221002012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74073667337410.

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

Adding to 222221002012221 its reverse (122210200122222), we get a palindrome (344431202134443).

The spelling of 222221002012221 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two million, twelve thousand, two hundred twenty-one".