111221120122221 has 8 divisors (see below), whose sum is σ = 148306045191520. Its totient is φ = 74141804233872.

The previous prime is 111221120122181. The next prime is 111221120122243. The reversal of 111221120122221 is 122221021122111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111221120122221 - 2¹⁸ = 111221119860077 is a prime.

It is a super-2 number, since 2×111221120122221² (a number of 29 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 (111221122122221) 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 7 ways as a sum of consecutive naturals, for example, 1402248970 + ... + 1402328283.

It is an arithmetic number, because the mean of its divisors is an integer number (18538255648940).

Almost surely, 2^{111221120122221} is an apocalyptic number.

It is an amenable number.

111221120122221 is a deficient number, since it is larger than the sum of its proper divisors (37084925069299).

111221120122221 is a wasteful number, since it uses less digits than its factorization.

111221120122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804590475.

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

Adding to 111221120122221 its reverse (122221021122111), we get a palindrome (233442141244332).

The spelling of 111221120122221 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twenty-two thousand, two hundred twenty-one".