12197757781441 has 4 divisors (see below), whose sum is σ = 12199104270000. Its totient is φ = 12196411292884.

The previous prime is 12197757781409. The next prime is 12197757781463. The reversal of 12197757781441 is 14418775779121.

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 12197757781441 - 2⁵ = 12197757781409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12197757781471) 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, 673230691 + ... + 673248808.

It is an arithmetic number, because the mean of its divisors is an integer number (3049776067500).

Almost surely, 2^{12197757781441} is an apocalyptic number.

It is an amenable number.

12197757781441 is a deficient number, since it is larger than the sum of its proper divisors (1346488559).

12197757781441 is an equidigital number, since it uses as much as digits as its factorization.

12197757781441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346488558.

The product of its digits is 27659520, while the sum is 64.

The spelling of 12197757781441 in words is "twelve trillion, one hundred ninety-seven billion, seven hundred fifty-seven million, seven hundred eighty-one thousand, four hundred forty-one".