12705522105 has 16 divisors (see below), whose sum is σ = 20351931264. Its totient is φ = 6768579840.

The previous prime is 12705522083. The next prime is 12705522119. The reversal of 12705522105 is 50122550721.

It is not a de Polignac number, because 12705522105 - 2⁸ = 12705521849 is a prime.

It is a super-2 number, since 2×12705522105² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467509 + ... + 493938.

It is an arithmetic number, because the mean of its divisors is an integer number (1271995704).

Almost surely, 2^12705522105 is an apocalyptic number.

12705522105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12705522105 is a deficient number, since it is larger than the sum of its proper divisors (7646409159).

12705522105 is an equidigital number, since it uses as much as digits as its factorization.

12705522105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962336.

The product of its (nonzero) digits is 7000, while the sum is 30.

The spelling of 12705522105 in words is "twelve billion, seven hundred five million, five hundred twenty-two thousand, one hundred five".