111102212221121 has 12 divisors (see below), whose sum is σ = 122387835842916. Its totient is φ = 100781000094720.

The previous prime is 111102212221097. The next prime is 111102212221127. The reversal of 111102212221121 is 121122212201111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 92844016513600 + 18258195707521 = 9635560^2 + 4272961^2 .

It is a de Polignac number, because none of the positive numbers 2^k-111102212221121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111102212221093 and 111102212221102.

It is not an unprimeable number, because it can be changed into a prime (111102212221127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1004540000 + ... + 1004650593.

It is an arithmetic number, because the mean of its divisors is an integer number (10198986320243).

Almost surely, 2^{111102212221121} is an apocalyptic number.

111102212221121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111102212221121 is a deficient number, since it is larger than the sum of its proper divisors (11285623621795).

111102212221121 is a wasteful number, since it uses less digits than its factorization.

111102212221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009191072 (or 2009191061 counting only the distinct ones).

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

Adding to 111102212221121 its reverse (121122212201111), we get a palindrome (232224424422232).

The spelling of 111102212221121 in words is "one hundred eleven trillion, one hundred two billion, two hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".