12312042241521 has 24 divisors (see below), whose sum is σ = 19023828731424. Its totient is φ = 7022911790080.

The previous prime is 12312042241517. The next prime is 12312042241537. The reversal of 12312042241521 is 12514224021321.

It is not a de Polignac number, because 12312042241521 - 2² = 12312042241517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12312042241511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 645478680 + ... + 645497753.

It is an arithmetic number, because the mean of its divisors is an integer number (792659530476).

Almost surely, 2^{12312042241521} is an apocalyptic number.

12312042241521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12312042241521 is a deficient number, since it is larger than the sum of its proper divisors (6711786489903).

12312042241521 is a wasteful number, since it uses less digits than its factorization.

12312042241521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290976481 (or 1290976464 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 12312042241521 its reverse (12514224021321), we get a palindrome (24826266262842).

The spelling of 12312042241521 in words is "twelve trillion, three hundred twelve billion, forty-two million, two hundred forty-one thousand, five hundred twenty-one".