12113305817851 has 4 divisors (see below), whose sum is σ = 13843778077552. Its totient is φ = 10382833558152.

The previous prime is 12113305817819. The next prime is 12113305817857. The reversal of 12113305817851 is 15871850331121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12113305817851 - 2⁵ = 12113305817819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12113305817857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865236129840 + ... + 865236129853.

It is an arithmetic number, because the mean of its divisors is an integer number (3460944519388).

Almost surely, 2^{12113305817851} is an apocalyptic number.

12113305817851 is a deficient number, since it is larger than the sum of its proper divisors (1730472259701).

12113305817851 is an equidigital number, since it uses as much as digits as its factorization.

12113305817851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730472259700.

The product of its (nonzero) digits is 201600, while the sum is 46.

The spelling of 12113305817851 in words is "twelve trillion, one hundred thirteen billion, three hundred five million, eight hundred seventeen thousand, eight hundred fifty-one".