12109645871 has 2 divisors, whose sum is σ = 12109645872. Its totient is φ = 12109645870.

The previous prime is 12109645837. The next prime is 12109645879. The reversal of 12109645871 is 17854690121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12109645871 - 2¹⁴ = 12109629487 is a prime.

It is a super-3 number, since 3×12109645871³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12109645879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6054822935 + 6054822936.

It is an arithmetic number, because the mean of its divisors is an integer number (6054822936).

Almost surely, 2^12109645871 is an apocalyptic number.

12109645871 is a deficient number, since it is larger than the sum of its proper divisors (1).

12109645871 is an equidigital number, since it uses as much as digits as its factorization.

12109645871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 12109645871 in words is "twelve billion, one hundred nine million, six hundred forty-five thousand, eight hundred seventy-one".