1122443121 has 4 divisors (see below), whose sum is σ = 1496590832. Its totient is φ = 748295412.

The previous prime is 1122443117. The next prime is 1122443159. The reversal of 1122443121 is 1213442211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1122443121 - 2² = 1122443117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122443191) 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 3 ways as a sum of consecutive naturals, for example, 187073851 + ... + 187073856.

It is an arithmetic number, because the mean of its divisors is an integer number (374147708).

Almost surely, 2^1122443121 is an apocalyptic number.

It is an amenable number.

1122443121 is a deficient number, since it is larger than the sum of its proper divisors (374147711).

1122443121 is an equidigital number, since it uses as much as digits as its factorization.

1122443121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374147710.

The product of its digits is 384, while the sum is 21.

The square root of 1122443121 is about 33502.8822789921. The cubic root of 1122443121 is about 1039.2533845600.

Adding to 1122443121 its reverse (1213442211), we get a palindrome (2335885332).

It can be divided in two parts, 11224 and 43121, that added together give a palindrome (54345).

The spelling of 1122443121 in words is "one billion, one hundred twenty-two million, four hundred forty-three thousand, one hundred twenty-one".