12278209123149 has 4 divisors (see below), whose sum is σ = 16370945497536. Its totient is φ = 8185472748764.

The previous prime is 12278209123127. The next prime is 12278209123183. The reversal of 12278209123149 is 94132190287221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12278209123149 - 2¹³ = 12278209114957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278209123549) 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 3 ways as a sum of consecutive naturals, for example, 2046368187189 + ... + 2046368187194.

It is an arithmetic number, because the mean of its divisors is an integer number (4092736374384).

Almost surely, 2^{12278209123149} is an apocalyptic number.

It is an amenable number.

12278209123149 is a deficient number, since it is larger than the sum of its proper divisors (4092736374387).

12278209123149 is an equidigital number, since it uses as much as digits as its factorization.

12278209123149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092736374386.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 12278209123149 in words is "twelve trillion, two hundred seventy-eight billion, two hundred nine million, one hundred twenty-three thousand, one hundred forty-nine".