133011021 has 16 divisors (see below), whose sum is σ = 208353600. Its totient is φ = 74411520.

The previous prime is 133011019. The next prime is 133011059. The reversal of 133011021 is 120110331.

It is not a de Polignac number, because 133011021 - 2¹ = 133011019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133010988 and 133011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133011061) 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 15 ways as a sum of consecutive naturals, for example, 154596 + ... + 155453.

It is an arithmetic number, because the mean of its divisors is an integer number (13022100).

Almost surely, 2^133011021 is an apocalyptic number.

133011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133011021 is a deficient number, since it is larger than the sum of its proper divisors (75342579).

133011021 is a wasteful number, since it uses less digits than its factorization.

133011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310076.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 133011021 is about 11533.0404057213. The cubic root of 133011021 is about 510.4609711465.

Adding to 133011021 its reverse (120110331), we get a palindrome (253121352).

The spelling of 133011021 in words is "one hundred thirty-three million, eleven thousand, twenty-one".