21330202133333 has 6 divisors (see below), whose sum is σ = 22658726833986. Its totient is φ = 20075484360512.

The previous prime is 21330202133293. The next prime is 21330202133341. The reversal of 21330202133333 is 33333120203312.

It can be written as a sum of positive squares in 3 ways, for example, as 2999276712964 + 18330925420369 = 1731842^2 + 4281463^2 .

It is not a de Polignac number, because 21330202133333 - 2⁶ = 21330202133269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21330202133296 and 21330202133305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330202133353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36903463610 + ... + 36903464187.

It is an arithmetic number, because the mean of its divisors is an integer number (3776454472331).

Almost surely, 2^{21330202133333} is an apocalyptic number.

It is an amenable number.

21330202133333 is a deficient number, since it is larger than the sum of its proper divisors (1328524700653).

21330202133333 is an equidigital number, since it uses as much as digits as its factorization.

21330202133333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73806927831 (or 73806927814 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 29.

Adding to 21330202133333 its reverse (33333120203312), we get a palindrome (54663322336645).

The spelling of 21330202133333 in words is "twenty-one trillion, three hundred thirty billion, two hundred two million, one hundred thirty-three thousand, three hundred thirty-three".