12042665212105 has 32 divisors (see below), whose sum is σ = 16243763437440. Its totient is φ = 8493833041920.

The previous prime is 12042665212103. The next prime is 12042665212133. The reversal of 12042665212105 is 50121256624021.

It is not a de Polignac number, because 12042665212105 - 2¹ = 12042665212103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (12042665212103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9013320 + ... + 10262809.

It is an arithmetic number, because the mean of its divisors is an integer number (507617607420).

Almost surely, 2^{12042665212105} is an apocalyptic number.

It is an amenable number.

12042665212105 is a deficient number, since it is larger than the sum of its proper divisors (4201098225335).

12042665212105 is a wasteful number, since it uses less digits than its factorization.

12042665212105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19276489.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 12042665212105 in words is "twelve trillion, forty-two billion, six hundred sixty-five million, two hundred twelve thousand, one hundred five".