12331061521 has 8 divisors (see below), whose sum is σ = 12684882600. Its totient is φ = 11978322048.

The previous prime is 12331061513. The next prime is 12331061527. The reversal of 12331061521 is 12516013321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 588305025 + 11742756496 = 24255^2 + 108364^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12331061521 - 2³ = 12331061513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12331061527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247246 + ... + 292903.

It is an arithmetic number, because the mean of its divisors is an integer number (1585610325).

Almost surely, 2^12331061521 is an apocalyptic number.

It is an amenable number.

12331061521 is a deficient number, since it is larger than the sum of its proper divisors (353821079).

12331061521 is an equidigital number, since it uses as much as digits as its factorization.

12331061521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540803.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 12331061521 its reverse (12516013321), we get a palindrome (24847074842).

The spelling of 12331061521 in words is "twelve billion, three hundred thirty-one million, sixty-one thousand, five hundred twenty-one".