21202130333 has 4 divisors (see below), whose sum is σ = 21213356220. Its totient is φ = 21190904448.

The previous prime is 21202130321. The next prime is 21202130351. The reversal of 21202130333 is 33303120212.

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 16615725604 + 4586404729 = 128902^2 + 67723^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202130333 - 2¹⁴ = 21202113949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202100333) 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, 5610110 + ... + 5613887.

It is an arithmetic number, because the mean of its divisors is an integer number (5303339055).

Almost surely, 2^21202130333 is an apocalyptic number.

It is an amenable number.

21202130333 is a deficient number, since it is larger than the sum of its proper divisors (11225887).

21202130333 is a wasteful number, since it uses less digits than its factorization.

21202130333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11225886.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21202130333 its reverse (33303120212), we get a palindrome (54505250545).

The spelling of 21202130333 in words is "twenty-one billion, two hundred two million, one hundred thirty thousand, three hundred thirty-three".