11846520221 has 2 divisors, whose sum is σ = 11846520222. Its totient is φ = 11846520220.

The previous prime is 11846520211. The next prime is 11846520239. The reversal of 11846520221 is 12202564811.

11846520221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7415620996 + 4430899225 = 86114^2 + 66565^2 .

It is a cyclic number.

It is not a de Polignac number, because 11846520221 - 2¹⁰ = 11846519197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11846520211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5923260110 + 5923260111.

It is an arithmetic number, because the mean of its divisors is an integer number (5923260111).

Almost surely, 2^11846520221 is an apocalyptic number.

It is an amenable number.

11846520221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11846520221 is an equidigital number, since it uses as much as digits as its factorization.

11846520221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 32.

The spelling of 11846520221 in words is "eleven billion, eight hundred forty-six million, five hundred twenty thousand, two hundred twenty-one".