1121445111 has 4 divisors (see below), whose sum is σ = 1495260152. Its totient is φ = 747630072.

The previous prime is 1121445107. The next prime is 1121445131. The reversal of 1121445111 is 1115441211.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1121445111 - 2² = 1121445107 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 (1121445131) 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 3 ways as a sum of consecutive naturals, for example, 186907516 + ... + 186907521.

It is an arithmetic number, because the mean of its divisors is an integer number (373815038).

Almost surely, 2^1121445111 is an apocalyptic number.

1121445111 is a deficient number, since it is larger than the sum of its proper divisors (373815041).

1121445111 is an equidigital number, since it uses as much as digits as its factorization.

1121445111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373815040.

The product of its digits is 160, while the sum is 21.

The square root of 1121445111 is about 33487.9845765612. The cubic root of 1121445111 is about 1038.9452790224.

Adding to 1121445111 its reverse (1115441211), we get a palindrome (2236886322).

The spelling of 1121445111 in words is "one billion, one hundred twenty-one million, four hundred forty-five thousand, one hundred eleven".