21330113202133 has 4 divisors (see below), whose sum is σ = 21330198365868. Its totient is φ = 21330028038400.

The previous prime is 21330113202127. The next prime is 21330113202137. The reversal of 21330113202133 is 33120231103312.

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 3195520910404 + 18134592291729 = 1787602^2 + 4258473^2 .

It is a cyclic number.

It is not a de Polignac number, because 21330113202133 - 2¹³ = 21330113193941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21330113202098 and 21330113202107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330113202137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42205066 + ... + 42707467.

It is an arithmetic number, because the mean of its divisors is an integer number (5332549591467).

Almost surely, 2^{21330113202133} is an apocalyptic number.

It is an amenable number.

21330113202133 is a deficient number, since it is larger than the sum of its proper divisors (85163735).

21330113202133 is an equidigital number, since it uses as much as digits as its factorization.

21330113202133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85163734.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21330113202133 its reverse (33120231103312), we get a palindrome (54450344305445).

The spelling of 21330113202133 in words is "twenty-one trillion, three hundred thirty billion, one hundred thirteen million, two hundred two thousand, one hundred thirty-three".