12182056921 has 2 divisors, whose sum is σ = 12182056922. Its totient is φ = 12182056920.

The previous prime is 12182056867. The next prime is 12182057023. The reversal of 12182056921 is 12965028121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12041989696 + 140067225 = 109736^2 + 11835^2 .

It is a cyclic number.

It is not a de Polignac number, because 12182056921 - 2⁷ = 12182056793 is a prime.

It is not a weakly prime, because it can be changed into another prime (12182056121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6091028460 + 6091028461.

It is an arithmetic number, because the mean of its divisors is an integer number (6091028461).

Almost surely, 2^12182056921 is an apocalyptic number.

It is an amenable number.

12182056921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12182056921 is an equidigital number, since it uses as much as digits as its factorization.

12182056921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 12182056921 in words is "twelve billion, one hundred eighty-two million, fifty-six thousand, nine hundred twenty-one".