133010021 has 4 divisors (see below), whose sum is σ = 134057472. Its totient is φ = 131962572.

The previous prime is 133009999. The next prime is 133010029. The reversal of 133010021 is 120010331.

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.

It is a cyclic number.

It is not a de Polignac number, because 133010021 - 2⁶ = 133009957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 133009984 and 133010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133010029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523535 + ... + 523788.

It is an arithmetic number, because the mean of its divisors is an integer number (33514368).

Almost surely, 2^133010021 is an apocalyptic number.

It is an amenable number.

133010021 is a deficient number, since it is larger than the sum of its proper divisors (1047451).

133010021 is a wasteful number, since it uses less digits than its factorization.

133010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047450.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 133010021 is about 11532.9970519375. The cubic root of 133010021 is about 510.4596918985.

Adding to 133010021 its reverse (120010331), we get a palindrome (253020352).

The spelling of 133010021 in words is "one hundred thirty-three million, ten thousand, twenty-one".