21202013033 has 4 divisors (see below), whose sum is σ = 21337057860. Its totient is φ = 21066968208.

The previous prime is 21202013017. The next prime is 21202013039. The reversal of 21202013033 is 33031020212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13131326464 + 8070686569 = 114592^2 + 89837^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202013033 - 2⁴ = 21202013017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202013039) 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, 67522178 + ... + 67522491.

It is an arithmetic number, because the mean of its divisors is an integer number (5334264465).

Almost surely, 2^21202013033 is an apocalyptic number.

It is an amenable number.

21202013033 is a deficient number, since it is larger than the sum of its proper divisors (135044827).

21202013033 is a wasteful number, since it uses less digits than its factorization.

21202013033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135044826.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21202013033 its reverse (33031020212), we get a palindrome (54233033245).

The spelling of 21202013033 in words is "twenty-one billion, two hundred two million, thirteen thousand, thirty-three".