1330111021 has 4 divisors (see below), whose sum is σ = 1330200252. Its totient is φ = 1330021792.

The previous prime is 1330110983. The next prime is 1330111043. The reversal of 1330111021 is 1201110331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1201110331 = 4297 ⋅279523.

It can be written as a sum of positive squares in 2 ways, for example, as 376166025 + 953944996 = 19395^2 + 30886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1330111021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1330110992 and 1330111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330111051) 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, 16240 + ... + 54073.

It is an arithmetic number, because the mean of its divisors is an integer number (332550063).

Almost surely, 2^1330111021 is an apocalyptic number.

It is an amenable number.

1330111021 is a deficient number, since it is larger than the sum of its proper divisors (89231).

1330111021 is an equidigital number, since it uses as much as digits as its factorization.

1330111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89230.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1330111021 is about 36470.6871473516. The cubic root of 1330111021 is about 1099.7550476610.

Adding to 1330111021 its reverse (1201110331), we get a palindrome (2531221352).

The spelling of 1330111021 in words is "one billion, three hundred thirty million, one hundred eleven thousand, twenty-one".