123560561231 has 16 divisors (see below), whose sum is σ = 126589123968. Its totient is φ = 120568197600.

The previous prime is 123560561209. The next prime is 123560561237. The reversal of 123560561231 is 132165065321.

It is a cyclic number.

It is not a de Polignac number, because 123560561231 - 2¹⁸ = 123560299087 is a prime.

It is a super-2 number, since 2×123560561231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123560561191 and 123560561200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123560561237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3902936 + ... + 3934466.

It is an arithmetic number, because the mean of its divisors is an integer number (7911820248).

Almost surely, 2^123560561231 is an apocalyptic number.

123560561231 is a deficient number, since it is larger than the sum of its proper divisors (3028562737).

123560561231 is a wasteful number, since it uses less digits than its factorization.

123560561231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32102.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 123560561231 in words is "one hundred twenty-three billion, five hundred sixty million, five hundred sixty-one thousand, two hundred thirty-one".