133021271 has 2 divisors, whose sum is σ = 133021272. Its totient is φ = 133021270.

The previous prime is 133021267. The next prime is 133021321. The reversal of 133021271 is 172120331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133021271 - 2² = 133021267 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133021201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66510635 + 66510636.

It is an arithmetic number, because the mean of its divisors is an integer number (66510636).

Almost surely, 2^133021271 is an apocalyptic number.

133021271 is a deficient number, since it is larger than the sum of its proper divisors (1).

133021271 is an equidigital number, since it uses as much as digits as its factorization.

133021271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 133021271 is about 11533.4847726088. The cubic root of 133021271 is about 510.4740830689.

The spelling of 133021271 in words is "one hundred thirty-three million, twenty-one thousand, two hundred seventy-one".