12280321873 has 2 divisors, whose sum is σ = 12280321874. Its totient is φ = 12280321872.

The previous prime is 12280321871. The next prime is 12280321903. The reversal of 12280321873 is 37812308221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11747958544 + 532363329 = 108388^2 + 23073^2 .

It is an emirp because it is prime and its reverse (37812308221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12280321873 - 2¹ = 12280321871 is a prime.

Together with 12280321871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12280321871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6140160936 + 6140160937.

It is an arithmetic number, because the mean of its divisors is an integer number (6140160937).

Almost surely, 2^12280321873 is an apocalyptic number.

It is an amenable number.

12280321873 is a deficient number, since it is larger than the sum of its proper divisors (1).

12280321873 is an equidigital number, since it uses as much as digits as its factorization.

12280321873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

It can be divided in two parts, 12280 and 321873, that added together give a triangular number (334153 = T₈₁₇).

The spelling of 12280321873 in words is "twelve billion, two hundred eighty million, three hundred twenty-one thousand, eight hundred seventy-three".