12124445677 has 4 divisors (see below), whose sum is σ = 12452133436. Its totient is φ = 11796757920.

The previous prime is 12124445659. The next prime is 12124445687. The reversal of 12124445677 is 77654442121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77654442121 = 179 ⋅433823699.

It can be written as a sum of positive squares in 2 ways, for example, as 7994326921 + 4130118756 = 89411^2 + 64266^2 .

It is a cyclic number.

It is not a de Polignac number, because 12124445677 - 2⁷ = 12124445549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12124445617) 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, 163843824 + ... + 163843897.

It is an arithmetic number, because the mean of its divisors is an integer number (3113033359).

Almost surely, 2^12124445677 is an apocalyptic number.

It is an amenable number.

12124445677 is a deficient number, since it is larger than the sum of its proper divisors (327687759).

12124445677 is an equidigital number, since it uses as much as digits as its factorization.

12124445677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327687758.

The product of its digits is 376320, while the sum is 43.

Adding to 12124445677 its reverse (77654442121), we get a palindrome (89778887798).

It can be divided in two parts, 1212444 and 5677, that added together give a palindrome (1218121).

The spelling of 12124445677 in words is "twelve billion, one hundred twenty-four million, four hundred forty-five thousand, six hundred seventy-seven".