12520443243 has 64 divisors (see below), whose sum is σ = 21974446080. Its totient is φ = 6143299200.

The previous prime is 12520443239. The next prime is 12520443253. The reversal of 12520443243 is 34234402521.

It is not a de Polignac number, because 12520443243 - 2² = 12520443239 is a prime.

It is a super-2 number, since 2×12520443243² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12520443243.

It is not an unprimeable number, because it can be changed into a prime (12520443253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1518873 + ... + 1527093.

It is an arithmetic number, because the mean of its divisors is an integer number (343350720).

Almost surely, 2^12520443243 is an apocalyptic number.

12520443243 is a deficient number, since it is larger than the sum of its proper divisors (9454002837).

12520443243 is a wasteful number, since it uses less digits than its factorization.

12520443243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8608.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 12520443243 its reverse (34234402521), we get a palindrome (46754845764).

The spelling of 12520443243 in words is "twelve billion, five hundred twenty million, four hundred forty-three thousand, two hundred forty-three".