1112212222121 has 48 divisors (see below), whose sum is σ = 1502150012928. Its totient is φ = 799659806400.

The previous prime is 1112212222111. The next prime is 1112212222157. The reversal of 1112212222121 is 1212222122111.

It is a de Polignac number, because none of the positive numbers 2^k-1112212222121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112212222093 and 1112212222102.

It is not an unprimeable number, because it can be changed into a prime (1112212222111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33700190 + ... + 33733176.

It is an arithmetic number, because the mean of its divisors is an integer number (31294791936).

Almost surely, 2^{1112212222121} is an apocalyptic number.

1112212222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1112212222121 is a deficient number, since it is larger than the sum of its proper divisors (389937790807).

1112212222121 is a wasteful number, since it uses less digits than its factorization.

1112212222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35622 (or 35609 counting only the distinct ones).

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

Adding to 1112212222121 its reverse (1212222122111), we get a palindrome (2324434344232).

The spelling of 1112212222121 in words is "one trillion, one hundred twelve billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-one".