133181101 has 2 divisors, whose sum is σ = 133181102. Its totient is φ = 133181100.

The previous prime is 133181071. The next prime is 133181119. The reversal of 133181101 is 101181331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68459076 + 64722025 = 8274^2 + 8045^2 .

It is a cyclic number.

It is not a de Polignac number, because 133181101 - 2¹³ = 133172909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133181131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66590550 + 66590551.

It is an arithmetic number, because the mean of its divisors is an integer number (66590551).

Almost surely, 2^133181101 is an apocalyptic number.

It is an amenable number.

133181101 is a deficient number, since it is larger than the sum of its proper divisors (1).

133181101 is an equidigital number, since it uses as much as digits as its factorization.

133181101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 133181101 is about 11540.4116477706. The cubic root of 133181101 is about 510.6784524314.

The spelling of 133181101 in words is "one hundred thirty-three million, one hundred eighty-one thousand, one hundred one".