13121124405 has 96 divisors (see below), whose sum is σ = 22812451200. Its totient is φ = 6436385280.

The previous prime is 13121124403. The next prime is 13121124421. The reversal of 13121124405 is 50442112131.

It is not a de Polignac number, because 13121124405 - 2¹ = 13121124403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121124403) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 37596171 + ... + 37596519.

It is an arithmetic number, because the mean of its divisors is an integer number (237629700).

Almost surely, 2^13121124405 is an apocalyptic number.

13121124405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13121124405 is a deficient number, since it is larger than the sum of its proper divisors (9691326795).

13121124405 is a wasteful number, since it uses less digits than its factorization.

13121124405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 13121124405 its reverse (50442112131), we get a palindrome (63563236536).

The spelling of 13121124405 in words is "thirteen billion, one hundred twenty-one million, one hundred twenty-four thousand, four hundred five".