12261733243 has 4 divisors (see below), whose sum is σ = 12281934400. Its totient is φ = 12241532088.

The previous prime is 12261733219. The next prime is 12261733247. The reversal of 12261733243 is 34233716221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12261733243 - 2³³ = 3671798651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12261733199 and 12261733208.

It is not an unprimeable number, because it can be changed into a prime (12261733247) 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, 10099668 + ... + 10100881.

It is an arithmetic number, because the mean of its divisors is an integer number (3070483600).

Almost surely, 2^12261733243 is an apocalyptic number.

12261733243 is a deficient number, since it is larger than the sum of its proper divisors (20201157).

12261733243 is an equidigital number, since it uses as much as digits as its factorization.

12261733243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201156.

The product of its digits is 36288, while the sum is 34.

The spelling of 12261733243 in words is "twelve billion, two hundred sixty-one million, seven hundred thirty-three thousand, two hundred forty-three".