133236021 has 8 divisors (see below), whose sum is σ = 188097984. Its totient is φ = 83599040.

The previous prime is 133236013. The next prime is 133236043. The reversal of 133236021 is 120632331.

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

It is a cyclic number.

It is not a de Polignac number, because 133236021 - 2³ = 133236013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133236221) 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, 1306185 + ... + 1306286.

It is an arithmetic number, because the mean of its divisors is an integer number (23512248).

Almost surely, 2^133236021 is an apocalyptic number.

It is an amenable number.

133236021 is a deficient number, since it is larger than the sum of its proper divisors (54861963).

133236021 is a wasteful number, since it uses less digits than its factorization.

133236021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612491.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 133236021 is about 11542.7908670304. The cubic root of 133236021 is about 510.7486390823.

Adding to 133236021 its reverse (120632331), we get a palindrome (253868352).

The spelling of 133236021 in words is "one hundred thirty-three million, two hundred thirty-six thousand, twenty-one".