221211001222122 has 16 divisors (see below), whose sum is σ = 454379353862112. Its totient is φ = 71744108504400.

The previous prime is 221211001222121. The next prime is 221211001222129. The reversal of 221211001222122 is 221222100112122.

It is not an unprimeable number, because it can be changed into a prime (221211001222121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498222975504 + ... + 498222975947.

It is an arithmetic number, because the mean of its divisors is an integer number (28398709616382).

Almost surely, 2^{221211001222122} is an apocalyptic number.

221211001222122 is an abundant number, since it is smaller than the sum of its proper divisors (233168352639990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221211001222122 is a wasteful number, since it uses less digits than its factorization.

221211001222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996445951493.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221211001222122 its reverse (221222100112122), we get a palindrome (442433101334244).

The spelling of 221211001222122 in words is "two hundred twenty-one trillion, two hundred eleven billion, one million, two hundred twenty-two thousand, one hundred twenty-two".