12356820841 has 2 divisors, whose sum is σ = 12356820842. Its totient is φ = 12356820840.

The previous prime is 12356820811. The next prime is 12356820877. The reversal of 12356820841 is 14802865321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7784356441 + 4572464400 = 88229^2 + 67620^2 .

It is a cyclic number.

It is not a de Polignac number, because 12356820841 - 2⁵ = 12356820809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12356820794 and 12356820803.

It is not a weakly prime, because it can be changed into another prime (12356820811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6178410420 + 6178410421.

It is an arithmetic number, because the mean of its divisors is an integer number (6178410421).

Almost surely, 2^12356820841 is an apocalyptic number.

It is an amenable number.

12356820841 is a deficient number, since it is larger than the sum of its proper divisors (1).

12356820841 is an equidigital number, since it uses as much as digits as its factorization.

12356820841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 12356820841 in words is "twelve billion, three hundred fifty-six million, eight hundred twenty thousand, eight hundred forty-one".