1123340421 has 16 divisors (see below), whose sum is σ = 1733427200. Its totient is φ = 633782448.

The previous prime is 1123340419. The next prime is 1123340429. The reversal of 1123340421 is 1240433211.

It is not a de Polignac number, because 1123340421 - 2¹ = 1123340419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123340429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336901 + ... + 340218.

It is an arithmetic number, because the mean of its divisors is an integer number (108339200).

Almost surely, 2^1123340421 is an apocalyptic number.

It is an amenable number.

1123340421 is a deficient number, since it is larger than the sum of its proper divisors (610086779).

1123340421 is an equidigital number, since it uses as much as digits as its factorization.

1123340421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677208.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1123340421 is about 33516.2709888794. The cubic root of 1123340421 is about 1039.5302430376.

Adding to 1123340421 its reverse (1240433211), we get a palindrome (2363773632).

The spelling of 1123340421 in words is "one billion, one hundred twenty-three million, three hundred forty thousand, four hundred twenty-one".