12105519405 has 64 divisors (see below), whose sum is σ = 22546667520. Its totient is φ = 5431539456.

The previous prime is 12105519403. The next prime is 12105519407. The reversal of 12105519405 is 50491550121.

It is an interprime number because it is at equal distance from previous prime (12105519403) and next prime (12105519407).

It is not a de Polignac number, because 12105519405 - 2¹ = 12105519403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105519403) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5469079 + ... + 5471291.

It is an arithmetic number, because the mean of its divisors is an integer number (352291680).

Almost surely, 2^12105519405 is an apocalyptic number.

12105519405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12105519405 is a deficient number, since it is larger than the sum of its proper divisors (10441148115).

12105519405 is a wasteful number, since it uses less digits than its factorization.

12105519405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170.

The product of its (nonzero) digits is 9000, while the sum is 33.

The spelling of 12105519405 in words is "twelve billion, one hundred five million, five hundred nineteen thousand, four hundred five".