1122222112121 has 16 divisors (see below), whose sum is σ = 1254816785088. Its totient is φ = 995024712000.

The previous prime is 1122222112087. The next prime is 1122222112127. The reversal of 1122222112121 is 1212112222211.

It is not a de Polignac number, because 1122222112121 - 2¹⁰ = 1122222111097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122222112093 and 1122222112102.

It is not an unprimeable number, because it can be changed into a prime (1122222112127) 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, 7463630 + ... + 7612503.

It is an arithmetic number, because the mean of its divisors is an integer number (78426049068).

Almost surely, 2^{1122222112121} is an apocalyptic number.

1122222112121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1122222112121 is a deficient number, since it is larger than the sum of its proper divisors (132594672967).

1122222112121 is a wasteful number, since it uses less digits than its factorization.

1122222112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15076312.

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

Adding to 1122222112121 its reverse (1212112222211), we get a palindrome (2334334334332).

The spelling of 1122222112121 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twenty-one".