21001122323233 has 4 divisors (see below), whose sum is σ = 22616593271188. Its totient is φ = 19385651375280.

The previous prime is 21001122323227. The next prime is 21001122323239. The reversal of 21001122323233 is 33232322110012.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21001122323227) and next prime (21001122323239).

It can be written as a sum of positive squares in 2 ways, for example, as 4328992068129 + 16672130255104 = 2080623^2 + 4083152^2 .

It is a cyclic number.

It is not a de Polignac number, because 21001122323233 - 2⁹ = 21001122322721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21001122323198 and 21001122323207.

It is not an unprimeable number, because it can be changed into a prime (21001122323239) 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, 807735473958 + ... + 807735473983.

It is an arithmetic number, because the mean of its divisors is an integer number (5654148317797).

Almost surely, 2^{21001122323233} is an apocalyptic number.

It is an amenable number.

21001122323233 is a deficient number, since it is larger than the sum of its proper divisors (1615470947955).

21001122323233 is a wasteful number, since it uses less digits than its factorization.

21001122323233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615470947954.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21001122323233 its reverse (33232322110012), we get a palindrome (54233444433245).

The spelling of 21001122323233 in words is "twenty-one trillion, one billion, one hundred twenty-two million, three hundred twenty-three thousand, two hundred thirty-three".