111221022211121 has 8 divisors (see below), whose sum is σ = 111228280753920. Its totient is φ = 111213763972272.

The previous prime is 111221022211069. The next prime is 111221022211133. The reversal of 111221022211121 is 121112220122111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111221022211121 - 2¹⁰ = 111221022210097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221022211093 and 111221022211102.

It is not an unprimeable number, because it can be changed into a prime (111221022211721) 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, 1485504275 + ... + 1485579143.

It is an arithmetic number, because the mean of its divisors is an integer number (13903535094240).

Almost surely, 2^{111221022211121} is an apocalyptic number.

It is an amenable number.

111221022211121 is a deficient number, since it is larger than the sum of its proper divisors (7258542799).

111221022211121 is an equidigital number, since it uses as much as digits as its factorization.

111221022211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151975.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111221022211121 its reverse (121112220122111), we get a palindrome (232333242333232).

The spelling of 111221022211121 in words is "one hundred eleven trillion, two hundred twenty-one billion, twenty-two million, two hundred eleven thousand, one hundred twenty-one".