133078355821 has 2 divisors, whose sum is σ = 133078355822. Its totient is φ = 133078355820.

The previous prime is 133078355747. The next prime is 133078355831. The reversal of 133078355821 is 128553870331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96108680196 + 36969675625 = 310014^2 + 192275^2 .

It is a cyclic number.

It is not a de Polignac number, because 133078355821 - 2¹¹ = 133078353773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133078355831) 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, 66539177910 + 66539177911.

It is an arithmetic number, because the mean of its divisors is an integer number (66539177911).

Almost surely, 2^133078355821 is an apocalyptic number.

It is an amenable number.

133078355821 is a deficient number, since it is larger than the sum of its proper divisors (1).

133078355821 is an equidigital number, since it uses as much as digits as its factorization.

133078355821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 133078355821 in words is "one hundred thirty-three billion, seventy-eight million, three hundred fifty-five thousand, eight hundred twenty-one".