12261520337543 has 8 divisors (see below), whose sum is σ = 12493271250000. Its totient is φ = 12029784294528.

The previous prime is 12261520337497. The next prime is 12261520337581. The reversal of 12261520337543 is 34573302516221.

It is a happy number.

12261520337543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12261520337543 - 2¹⁴ = 12261520321159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12261520337494 and 12261520337503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261520337593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2045513 + ... + 5357906.

It is an arithmetic number, because the mean of its divisors is an integer number (1561658906250).

Almost surely, 2^{12261520337543} is an apocalyptic number.

12261520337543 is a deficient number, since it is larger than the sum of its proper divisors (231750912457).

12261520337543 is an equidigital number, since it uses as much as digits as its factorization.

12261520337543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7434721.

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 12261520337543 in words is "twelve trillion, two hundred sixty-one billion, five hundred twenty million, three hundred thirty-seven thousand, five hundred forty-three".