133101601 has 2 divisors, whose sum is σ = 133101602. Its totient is φ = 133101600.

The previous prime is 133101599. The next prime is 133101607. The reversal of 133101601 is 106101331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92448225 + 40653376 = 9615^2 + 6376^2 .

It is a cyclic number.

It is not a de Polignac number, because 133101601 - 2¹ = 133101599 is a prime.

Together with 133101599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (133101607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66550800 + 66550801.

It is an arithmetic number, because the mean of its divisors is an integer number (66550801).

Almost surely, 2^133101601 is an apocalyptic number.

It is an amenable number.

133101601 is a deficient number, since it is larger than the sum of its proper divisors (1).

133101601 is an equidigital number, since it uses as much as digits as its factorization.

133101601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 133101601 is about 11536.9667157360. The cubic root of 133101601 is about 510.5768188472.

Adding to 133101601 its reverse (106101331), we get a palindrome (239202932).

The spelling of 133101601 in words is "one hundred thirty-three million, one hundred one thousand, six hundred one".