12105533505 has 32 divisors (see below), whose sum is σ = 21343867776. Its totient is φ = 5821046784.

The previous prime is 12105533477. The next prime is 12105533507. The reversal of 12105533505 is 50533550121.

It is not a de Polignac number, because 12105533505 - 2¹² = 12105529409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12105533507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 713472 + ... + 730241.

It is an arithmetic number, because the mean of its divisors is an integer number (666995868).

Almost surely, 2^12105533505 is an apocalyptic number.

12105533505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12105533505 is a deficient number, since it is larger than the sum of its proper divisors (9238334271).

12105533505 is a wasteful number, since it uses less digits than its factorization.

12105533505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443777.

The product of its (nonzero) digits is 11250, while the sum is 30.

The spelling of 12105533505 in words is "twelve billion, one hundred five million, five hundred thirty-three thousand, five hundred five".