12520711481 has 4 divisors (see below), whose sum is σ = 12520989264. Its totient is φ = 12520433700.

The previous prime is 12520711453. The next prime is 12520711493. The reversal of 12520711481 is 18411702521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12520711481 - 2⁶ = 12520711417 is a prime.

It is a super-2 number, since 2×12520711481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12520711421) 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, 53975 + ... + 167196.

It is an arithmetic number, because the mean of its divisors is an integer number (3130247316).

Almost surely, 2^12520711481 is an apocalyptic number.

It is an amenable number.

12520711481 is a deficient number, since it is larger than the sum of its proper divisors (277783).

12520711481 is an equidigital number, since it uses as much as digits as its factorization.

12520711481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277782.

The product of its (nonzero) digits is 4480, while the sum is 32.

The spelling of 12520711481 in words is "twelve billion, five hundred twenty million, seven hundred eleven thousand, four hundred eighty-one".