12321510150521 has 24 divisors (see below), whose sum is σ = 14586076170120. Its totient is φ = 10339167294720.

The previous prime is 12321510150511. The next prime is 12321510150569. The reversal of 12321510150521 is 12505101512321.

It can be written as a sum of positive squares in 4 ways, for example, as 4660439028025 + 7661071122496 = 2158805^2 + 2767864^2 .

It is not a de Polignac number, because 12321510150521 - 2⁶ = 12321510150457 is a prime.

It is a super-2 number, since 2×12321510150521² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12321510150511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30138551 + ... + 30544643.

It is an arithmetic number, because the mean of its divisors is an integer number (607753173755).

Almost surely, 2^{12321510150521} is an apocalyptic number.

12321510150521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12321510150521 is a deficient number, since it is larger than the sum of its proper divisors (2264566019599).

12321510150521 is a wasteful number, since it uses less digits than its factorization.

12321510150521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425417 (or 425406 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 29.

Adding to 12321510150521 its reverse (12505101512321), we get a palindrome (24826611662842).

The spelling of 12321510150521 in words is "twelve trillion, three hundred twenty-one billion, five hundred ten million, one hundred fifty thousand, five hundred twenty-one".