133056556521601 has 2 divisors, whose sum is σ = 133056556521602. Its totient is φ = 133056556521600.

The previous prime is 133056556521571. The next prime is 133056556521653. The reversal of 133056556521601 is 106125655650331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131810261148225 + 1246295373376 = 11480865^2 + 1116376^2 .

It is a cyclic number.

It is not a de Polignac number, because 133056556521601 - 2¹⁷ = 133056556390529 is a prime.

It is not a weakly prime, because it can be changed into another prime (133056556521661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66528278260800 + 66528278260801.

It is an arithmetic number, because the mean of its divisors is an integer number (66528278260801).

Almost surely, 2^{133056556521601} is an apocalyptic number.

It is an amenable number.

133056556521601 is a deficient number, since it is larger than the sum of its proper divisors (1).

133056556521601 is an equidigital number, since it uses as much as digits as its factorization.

133056556521601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430000, while the sum is 49.

The spelling of 133056556521601 in words is "one hundred thirty-three trillion, fifty-six billion, five hundred fifty-six million, five hundred twenty-one thousand, six hundred one".