12145720129 has 8 divisors (see below), whose sum is σ = 12195320832. Its totient is φ = 12096213360.

The previous prime is 12145720127. The next prime is 12145720141. The reversal of 12145720129 is 92102754121.

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

It is a cyclic number.

It is not a de Polignac number, because 12145720129 - 2¹ = 12145720127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12145720094 and 12145720103.

It is not an unprimeable number, because it can be changed into a prime (12145720123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241707 + ... + 287599.

It is an arithmetic number, because the mean of its divisors is an integer number (1524415104).

Almost surely, 2^12145720129 is an apocalyptic number.

It is an amenable number.

12145720129 is a deficient number, since it is larger than the sum of its proper divisors (49600703).

12145720129 is an equidigital number, since it uses as much as digits as its factorization.

12145720129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46967.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 12145720129 in words is "twelve billion, one hundred forty-five million, seven hundred twenty thousand, one hundred twenty-nine".