111102222022121 has 12 divisors (see below), whose sum is σ = 122121979742532. Its totient is φ = 101000898900000.

The previous prime is 111102222022079. The next prime is 111102222022123. The reversal of 111102222022121 is 121220222201111.

It can be written as a sum of positive squares in 2 ways, for example, as 61168213062121 + 49934008960000 = 7821011^2 + 7066400^2 .

It is not a de Polignac number, because 111102222022121 - 2¹⁰ = 111102222021097 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111102222022093 and 111102222022102.

It is not an unprimeable number, because it can be changed into a prime (111102222022123) 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, 5948471 + ... + 16049571.

It is an arithmetic number, because the mean of its divisors is an integer number (10176831645211).

Almost surely, 2^{111102222022121} is an apocalyptic number.

111102222022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111102222022121 is a deficient number, since it is larger than the sum of its proper divisors (11019757720411).

111102222022121 is a wasteful number, since it uses less digits than its factorization.

111102222022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10192024 (or 10192013 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111102222022121 its reverse (121220222201111), we get a palindrome (232322444223232).

The spelling of 111102222022121 in words is "one hundred eleven trillion, one hundred two billion, two hundred twenty-two million, twenty-two thousand, one hundred twenty-one".