221220112222122 has 32 divisors (see below), whose sum is σ = 476474702501952. Its totient is φ = 68067639032064.

The previous prime is 221220112222093. The next prime is 221220112222127. The reversal of 221220112222122 is 221222211022122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221220112222092 and 221220112222101.

It is not an unprimeable number, because it can be changed into a prime (221220112222127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85702693 + ... + 88246199.

It is an arithmetic number, because the mean of its divisors is an integer number (14889834453186).

Almost surely, 2^{221220112222122} is an apocalyptic number.

221220112222122 is an abundant number, since it is smaller than the sum of its proper divisors (255254590279830).

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

221220112222122 is a wasteful number, since it uses less digits than its factorization.

221220112222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658582.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 221220112222122 its reverse (221222211022122), we get a palindrome (442442323244244).

The spelling of 221220112222122 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred twelve million, two hundred twenty-two thousand, one hundred twenty-two".