12124488581 has 4 divisors (see below), whose sum is σ = 12277963200. Its totient is φ = 11971013964.

The previous prime is 12124488559. The next prime is 12124488583. The reversal of 12124488581 is 18588442121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18588442121 = 19 ⋅978339059.

It is a cyclic number.

It is not a de Polignac number, because 12124488581 - 2¹⁸ = 12124226437 is a prime.

It is a super-2 number, since 2×12124488581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12124488583) 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, 76737191 + ... + 76737348.

It is an arithmetic number, because the mean of its divisors is an integer number (3069490800).

Almost surely, 2^12124488581 is an apocalyptic number.

It is an amenable number.

12124488581 is a deficient number, since it is larger than the sum of its proper divisors (153474619).

12124488581 is an equidigital number, since it uses as much as digits as its factorization.

12124488581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153474618.

The product of its digits is 163840, while the sum is 44.

The spelling of 12124488581 in words is "twelve billion, one hundred twenty-four million, four hundred eighty-eight thousand, five hundred eighty-one".