21011323321233 has 24 divisors (see below), whose sum is σ = 34746967290048. Its totient is φ = 11985144568992.

The previous prime is 21011323321217. The next prime is 21011323321243. The reversal of 21011323321233 is 33212332311012.

21011323321233 is a `hidden beast` number, since 2 + 1 + 0 + 11 + 323 + 321 + 2 + 3 + 3 = 666.

It is not a de Polignac number, because 21011323321233 - 2⁴ = 21011323321217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21011323321197 and 21011323321206.

It is not an unprimeable number, because it can be changed into a prime (21011323321213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296157310 + ... + 296228247.

It is an arithmetic number, because the mean of its divisors is an integer number (1447790303752).

Almost surely, 2^{21011323321233} is an apocalyptic number.

It is an amenable number.

21011323321233 is a deficient number, since it is larger than the sum of its proper divisors (13735643968815).

21011323321233 is a wasteful number, since it uses less digits than its factorization.

21011323321233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592386133 (or 592386130 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21011323321233 its reverse (33212332311012), we get a palindrome (54223655632245).

The spelling of 21011323321233 in words is "twenty-one trillion, eleven billion, three hundred twenty-three million, three hundred twenty-one thousand, two hundred thirty-three".