21230223332033 has 4 divisors (see below), whose sum is σ = 21262735160148. Its totient is φ = 21197711503920.

The previous prime is 21230223331997. The next prime is 21230223332063. The reversal of 21230223332033 is 33023332203212.

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 9071138019889 + 12159085312144 = 3011833^2 + 3486988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21230223332033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21230223331987 and 21230223332005.

It is not an unprimeable number, because it can be changed into a prime (21230223332063) 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, 16255913078 + ... + 16255914383.

It is an arithmetic number, because the mean of its divisors is an integer number (5315683790037).

Almost surely, 2^{21230223332033} is an apocalyptic number.

It is an amenable number.

21230223332033 is a deficient number, since it is larger than the sum of its proper divisors (32511828115).

21230223332033 is an equidigital number, since it uses as much as digits as its factorization.

21230223332033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32511828114.

The product of its (nonzero) digits is 23328, while the sum is 29.

Adding to 21230223332033 its reverse (33023332203212), we get a palindrome (54253555535245).

The spelling of 21230223332033 in words is "twenty-one trillion, two hundred thirty billion, two hundred twenty-three million, three hundred thirty-two thousand, thirty-three".