133411021 has 4 divisors (see below), whose sum is σ = 133462944. Its totient is φ = 133359100.

The previous prime is 133410973. The next prime is 133411037. The reversal of 133411021 is 120114331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120114331 = 5209 ⋅23059.

It is a cyclic number.

It is not a de Polignac number, because 133411021 - 2¹¹ = 133408973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133410986 and 133411004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133411081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21895 + ... + 27316.

It is an arithmetic number, because the mean of its divisors is an integer number (33365736).

Almost surely, 2^133411021 is an apocalyptic number.

It is an amenable number.

133411021 is a deficient number, since it is larger than the sum of its proper divisors (51923).

133411021 is an equidigital number, since it uses as much as digits as its factorization.

133411021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51922.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 133411021 is about 11550.3688685687. The cubic root of 133411021 is about 510.9721569842.

Adding to 133411021 its reverse (120114331), we get a palindrome (253525352).

The spelling of 133411021 in words is "one hundred thirty-three million, four hundred eleven thousand, twenty-one".