1121222111 has 8 divisors (see below), whose sum is σ = 1144887744. Its totient is φ = 1097781120.

The previous prime is 1121222093. The next prime is 1121222117. The reversal of 1121222111 is 1112221211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121222111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121222117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46055 + ... + 66056.

It is an arithmetic number, because the mean of its divisors is an integer number (143110968).

Almost surely, 2^1121222111 is an apocalyptic number.

1121222111 is a deficient number, since it is larger than the sum of its proper divisors (23665633).

1121222111 is a wasteful number, since it uses less digits than its factorization.

1121222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112321.

The product of its digits is 16, while the sum is 14.

The square root of 1121222111 is about 33484.6548586065. The cubic root of 1121222111 is about 1038.8764095035.

Adding to 1121222111 its reverse (1112221211), we get a palindrome (2233443322).

The spelling of 1121222111 in words is "one billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".