12105030657 has 8 divisors (see below), whose sum is σ = 16141007584. Its totient is φ = 8069537088.

The previous prime is 12105030631. The next prime is 12105030671. The reversal of 12105030657 is 75603050121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12105030657 - 2¹⁵ = 12104997889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12105030677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57688 + ... + 165945.

It is an arithmetic number, because the mean of its divisors is an integer number (2017625948).

Almost surely, 2^12105030657 is an apocalyptic number.

It is an amenable number.

12105030657 is a deficient number, since it is larger than the sum of its proper divisors (4035976927).

12105030657 is a wasteful number, since it uses less digits than its factorization.

12105030657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241679.

The product of its (nonzero) digits is 6300, while the sum is 30.

Adding to 12105030657 its reverse (75603050121), we get a palindrome (87708080778).

The spelling of 12105030657 in words is "twelve billion, one hundred five million, thirty thousand, six hundred fifty-seven".