561221232123241 has 4 divisors (see below), whose sum is σ = 561223509692800. Its totient is φ = 561218954553684.

The previous prime is 561221232123229. The next prime is 561221232123281. The reversal of 561221232123241 is 142321232122165.

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 561221232123241 - 2¹⁵ = 561221232090473 is a prime.

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 561221232123241.

It is not an unprimeable number, because it can be changed into a prime (561221232123281) 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, 1138415121 + ... + 1138907998.

It is an arithmetic number, because the mean of its divisors is an integer number (140305877423200).

Almost surely, 2^{561221232123241} is an apocalyptic number.

It is an amenable number.

561221232123241 is a deficient number, since it is larger than the sum of its proper divisors (2277569559).

561221232123241 is a wasteful number, since it uses less digits than its factorization.

561221232123241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277569558.

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

The spelling of 561221232123241 in words is "five hundred sixty-one trillion, two hundred twenty-one billion, two hundred thirty-two million, one hundred twenty-three thousand, two hundred forty-one".