122211210121221 has 48 divisors (see below), whose sum is σ = 188334265415744. Its totient is φ = 70053241430016.

The previous prime is 122211210121207. The next prime is 122211210121243. The reversal of 122211210121221 is 122121012112221.

It is not a de Polignac number, because 122211210121221 - 2⁶ = 122211210121157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211210121201) 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 47 ways as a sum of consecutive naturals, for example, 54798355 + ... + 56984928.

Almost surely, 2^{122211210121221} is an apocalyptic number.

It is an amenable number.

122211210121221 is a deficient number, since it is larger than the sum of its proper divisors (66123055294523).

122211210121221 is a wasteful number, since it uses less digits than its factorization.

122211210121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111783430 (or 111783413 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 122211210121221 its reverse (122121012112221), we get a palindrome (244332222233442).

The spelling of 122211210121221 in words is "one hundred twenty-two trillion, two hundred eleven billion, two hundred ten million, one hundred twenty-one thousand, two hundred twenty-one".