12105012553 has 16 divisors (see below), whose sum is σ = 12443673600. Its totient is φ = 11772034560.

The previous prime is 12105012551. The next prime is 12105012559. The reversal of 12105012553 is 35521050121.

It is a cyclic number.

It is not a de Polignac number, because 12105012553 - 2¹ = 12105012551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12105012551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1902225 + ... + 1908577.

It is an arithmetic number, because the mean of its divisors is an integer number (777729600).

Almost surely, 2^12105012553 is an apocalyptic number.

It is an amenable number.

12105012553 is a deficient number, since it is larger than the sum of its proper divisors (338661047).

12105012553 is an equidigital number, since it uses as much as digits as its factorization.

12105012553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6792.

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 12105012553 its reverse (35521050121), we get a palindrome (47626062674).

The spelling of 12105012553 in words is "twelve billion, one hundred five million, twelve thousand, five hundred fifty-three".