133221091 has 2 divisors, whose sum is σ = 133221092. Its totient is φ = 133221090.

The previous prime is 133221089. The next prime is 133221107. The reversal of 133221091 is 190122331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133221091 - 2¹ = 133221089 is a prime.

Together with 133221089, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133221031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66610545 + 66610546.

It is an arithmetic number, because the mean of its divisors is an integer number (66610546).

Almost surely, 2^133221091 is an apocalyptic number.

133221091 is a deficient number, since it is larger than the sum of its proper divisors (1).

133221091 is an equidigital number, since it uses as much as digits as its factorization.

133221091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 133221091 is about 11542.1441249016. The cubic root of 133221091 is about 510.7295607530.

The spelling of 133221091 in words is "one hundred thirty-three million, two hundred twenty-one thousand, ninety-one".