21013321230333 has 20 divisors (see below), whose sum is σ = 31391498263708. Its totient is φ = 14008332663360.

The previous prime is 21013321230331. The next prime is 21013321230427. The reversal of 21013321230333 is 33303212331012.

21013321230333 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 3 + 321 + 2 + 3 + 0 + 333 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3384558640089 + 17628762590244 = 1839717^2 + 4198662^2 .

It is not a de Polignac number, because 21013321230333 - 2¹ = 21013321230331 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 = 21013321230297 and 21013321230306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013321230331) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2987416 + ... + 7138017.

Almost surely, 2^{21013321230333} is an apocalyptic number.

It is an amenable number.

21013321230333 is a deficient number, since it is larger than the sum of its proper divisors (10378177033375).

21013321230333 is a wasteful number, since it uses less digits than its factorization.

21013321230333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10151066 (or 10151057 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 21013321230333 its reverse (33303212331012), we get a palindrome (54316533561345).

The spelling of 21013321230333 in words is "twenty-one trillion, thirteen billion, three hundred twenty-one million, two hundred thirty thousand, three hundred thirty-three".