12010413521 has 4 divisors (see below), whose sum is σ = 12716908452. Its totient is φ = 11303918592.

The previous prime is 12010413497. The next prime is 12010413553. The reversal of 12010413521 is 12531401021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12531401021 = 233 ⋅53782837.

It can be written as a sum of positive squares in 2 ways, for example, as 6528640000 + 5481773521 = 80800^2 + 74039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12010413521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12010413493 and 12010413502.

It is not an unprimeable number, because it can be changed into a prime (12010410521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353247440 + ... + 353247473.

It is an arithmetic number, because the mean of its divisors is an integer number (3179227113).

Almost surely, 2^12010413521 is an apocalyptic number.

It is an amenable number.

12010413521 is a deficient number, since it is larger than the sum of its proper divisors (706494931).

12010413521 is an equidigital number, since it uses as much as digits as its factorization.

12010413521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706494930.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 12010413521 its reverse (12531401021), we get a palindrome (24541814542).

The spelling of 12010413521 in words is "twelve billion, ten million, four hundred thirteen thousand, five hundred twenty-one".