12520042360381 has 4 divisors (see below), whose sum is σ = 12520050138432. Its totient is φ = 12520034582332.

The previous prime is 12520042360369. The next prime is 12520042360409. The reversal of 12520042360381 is 18306324002521.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12520042360381 is a prime.

It is a super-2 number, since 2×12520042360381² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12520042360381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520042360321) 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, 476245 + ... + 5026618.

It is an arithmetic number, because the mean of its divisors is an integer number (3130012534608).

Almost surely, 2^{12520042360381} is an apocalyptic number.

It is an amenable number.

12520042360381 is a deficient number, since it is larger than the sum of its proper divisors (7778051).

12520042360381 is an equidigital number, since it uses as much as digits as its factorization.

12520042360381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7778050.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 12520042360381 in words is "twelve trillion, five hundred twenty billion, forty-two million, three hundred sixty thousand, three hundred eighty-one".