111221223021121 has 16 divisors (see below), whose sum is σ = 117207695880000. Its totient is φ = 105248039897088.

The previous prime is 111221223021113. The next prime is 111221223021169. The reversal of 111221223021121 is 121120322122111.

It is a cyclic number.

It is not a de Polignac number, because 111221223021121 - 2³ = 111221223021113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221223021092 and 111221223021101.

It is not an unprimeable number, because it can be changed into a prime (111221223028121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238155981 + ... + 238622533.

It is an arithmetic number, because the mean of its divisors is an integer number (7325480992500).

Almost surely, 2^{111221223021121} is an apocalyptic number.

It is an amenable number.

111221223021121 is a deficient number, since it is larger than the sum of its proper divisors (5986472858879).

111221223021121 is a wasteful number, since it uses less digits than its factorization.

111221223021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480768.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 111221223021121 its reverse (121120322122111), we get a palindrome (232341545143232).

The spelling of 111221223021121 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred twenty-three million, twenty-one thousand, one hundred twenty-one".