222221102221 has 4 divisors (see below), whose sum is σ = 222228224892. Its totient is φ = 222213979552.

The previous prime is 222221102171. The next prime is 222221102239. The reversal of 222221102221 is 122201122222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 215528062500 + 6693039721 = 464250^2 + 81811^2 .

It is a cyclic number.

It is not a de Polignac number, because 222221102221 - 2¹⁹ = 222220577933 is a prime.

It is a super-2 number, since 2×222221102221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221102921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3514330 + ... + 3577003.

It is an arithmetic number, because the mean of its divisors is an integer number (55557056223).

Almost surely, 2^222221102221 is an apocalyptic number.

It is an amenable number.

222221102221 is a deficient number, since it is larger than the sum of its proper divisors (7122671).

222221102221 is an equidigital number, since it uses as much as digits as its factorization.

222221102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7122670.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222221102221 its reverse (122201122222), we get a palindrome (344422224443).

The spelling of 222221102221 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-one".