21331031123233 has 16 divisors (see below), whose sum is σ = 23049912085200. Its totient is φ = 19623400022016.

The previous prime is 21331031123221. The next prime is 21331031123287. The reversal of 21331031123233 is 33232113013312.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 97523794944 + 21233507328289 = 312288^2 + 4607983^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331031123233 - 2¹³ = 21331031115041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21331031123333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2870191 + ... + 7134427.

It is an arithmetic number, because the mean of its divisors is an integer number (1440619505325).

Almost surely, 2^{21331031123233} is an apocalyptic number.

It is an amenable number.

21331031123233 is a deficient number, since it is larger than the sum of its proper divisors (1718880961967).

21331031123233 is a wasteful number, since it uses less digits than its factorization.

21331031123233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4265556.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 21331031123233 its reverse (33232113013312), we get a palindrome (54563144136545).

The spelling of 21331031123233 in words is "twenty-one trillion, three hundred thirty-one billion, thirty-one million, one hundred twenty-three thousand, two hundred thirty-three".