133441021 has 8 divisors (see below), whose sum is σ = 154652544. Its totient is φ = 112766640.

The previous prime is 133441013. The next prime is 133441031. The reversal of 133441021 is 120144331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133441021 - 2³ = 133441013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133441021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133441031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133750 + ... + 134743.

It is an arithmetic number, because the mean of its divisors is an integer number (19331568).

Almost surely, 2^133441021 is an apocalyptic number.

It is an amenable number.

133441021 is a deficient number, since it is larger than the sum of its proper divisors (21211523).

133441021 is an equidigital number, since it uses as much as digits as its factorization.

133441021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268571.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 133441021 is about 11551.6674553936. The cubic root of 133441021 is about 511.0104547093.

Adding to 133441021 its reverse (120144331), we get a palindrome (253585352).

It can be divided in two parts, 13344 and 1021, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 133441021 in words is "one hundred thirty-three million, four hundred forty-one thousand, twenty-one".