12278209123187 has 16 divisors (see below), whose sum is σ = 14918606853120. Its totient is φ = 9876670264032.

The previous prime is 12278209123183. The next prime is 12278209123237. The reversal of 12278209123187 is 78132190287221.

It is a cyclic number.

It is not a de Polignac number, because 12278209123187 - 2² = 12278209123183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12278209123183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719445887 + ... + 719462952.

It is an arithmetic number, because the mean of its divisors is an integer number (932412928320).

Almost surely, 2^{12278209123187} is an apocalyptic number.

12278209123187 is a deficient number, since it is larger than the sum of its proper divisors (2640397729933).

12278209123187 is a wasteful number, since it uses less digits than its factorization.

12278209123187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438908922.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 12278209123187 in words is "twelve trillion, two hundred seventy-eight billion, two hundred nine million, one hundred twenty-three thousand, one hundred eighty-seven".