11233440521 has 2 divisors, whose sum is σ = 11233440522. Its totient is φ = 11233440520.

The previous prime is 11233440499. The next prime is 11233440587. The reversal of 11233440521 is 12504433211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6648119296 + 4585321225 = 81536^2 + 67715^2 .

It is a cyclic number.

It is not a de Polignac number, because 11233440521 - 2¹⁸ = 11233178377 is a prime.

It is not a weakly prime, because it can be changed into another prime (11233440121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5616720260 + 5616720261.

It is an arithmetic number, because the mean of its divisors is an integer number (5616720261).

Almost surely, 2^11233440521 is an apocalyptic number.

It is an amenable number.

11233440521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11233440521 is an equidigital number, since it uses as much as digits as its factorization.

11233440521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 11233440521 its reverse (12504433211), we get a palindrome (23737873732).

The spelling of 11233440521 in words is "eleven billion, two hundred thirty-three million, four hundred forty thousand, five hundred twenty-one".