3156450366221 has 2 divisors, whose sum is σ = 3156450366222. Its totient is φ = 3156450366220.

The previous prime is 3156450366193. The next prime is 3156450366239. The reversal of 3156450366221 is 1226630546513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3120610575625 + 35839790596 = 1766525^2 + 189314^2 .

It is a cyclic number.

It is not a de Polignac number, because 3156450366221 - 2¹⁰ = 3156450365197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3156450366241) 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 as a sum of consecutive naturals, namely, 1578225183110 + 1578225183111.

It is an arithmetic number, because the mean of its divisors is an integer number (1578225183111).

Almost surely, 2^{3156450366221} is an apocalyptic number.

It is an amenable number.

3156450366221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3156450366221 is an equidigital number, since it uses as much as digits as its factorization.

3156450366221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 3156450366221 in words is "three trillion, one hundred fifty-six billion, four hundred fifty million, three hundred sixty-six thousand, two hundred twenty-one".