1331224123 has 4 divisors (see below), whose sum is σ = 1334700288. Its totient is φ = 1327747960.

The previous prime is 1331224019. The next prime is 1331224159. The reversal of 1331224123 is 3214221331.

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

It is a cyclic number.

It is not a de Polignac number, because 1331224123 - 2⁹ = 1331223611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331224094 and 1331224103.

It is not an unprimeable number, because it can be changed into a prime (1331224163) 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, 1737508 + ... + 1738273.

It is an arithmetic number, because the mean of its divisors is an integer number (333675072).

Almost surely, 2^1331224123 is an apocalyptic number.

1331224123 is a deficient number, since it is larger than the sum of its proper divisors (3476165).

1331224123 is an equidigital number, since it uses as much as digits as its factorization.

1331224123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3476164.

The product of its digits is 864, while the sum is 22.

The square root of 1331224123 is about 36485.9441840279. The cubic root of 1331224123 is about 1100.0617384081.

Adding to 1331224123 its reverse (3214221331), we get a palindrome (4545445454).

The spelling of 1331224123 in words is "one billion, three hundred thirty-one million, two hundred twenty-four thousand, one hundred twenty-three".