12294147521 has 4 divisors (see below), whose sum is σ = 12432284100. Its totient is φ = 12156010944.

The previous prime is 12294147469. The next prime is 12294147539. The reversal of 12294147521 is 12574149221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3716609296 + 8577538225 = 60964^2 + 92615^2 .

It is a cyclic number.

It is not a de Polignac number, because 12294147521 - 2¹⁸ = 12293885377 is a prime.

It is a super-2 number, since 2×12294147521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12294147571) 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, 69068156 + ... + 69068333.

It is an arithmetic number, because the mean of its divisors is an integer number (3108071025).

Almost surely, 2^12294147521 is an apocalyptic number.

It is an amenable number.

12294147521 is a deficient number, since it is larger than the sum of its proper divisors (138136579).

12294147521 is an equidigital number, since it uses as much as digits as its factorization.

12294147521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138136578.

The product of its digits is 40320, while the sum is 38.

The spelling of 12294147521 in words is "twelve billion, two hundred ninety-four million, one hundred forty-seven thousand, five hundred twenty-one".