21220322031233 has 4 divisors (see below), whose sum is σ = 22852654495188. Its totient is φ = 19587989567280.

The previous prime is 21220322031169. The next prime is 21220322031239. The reversal of 21220322031233 is 33213022302212.

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 1691903735824 + 19528418295409 = 1300732^2 + 4419097^2 .

It is a cyclic number.

It is not a de Polignac number, because 21220322031233 - 2⁶ = 21220322031169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220322031239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816166231958 + ... + 816166231983.

It is an arithmetic number, because the mean of its divisors is an integer number (5713163623797).

Almost surely, 2^{21220322031233} is an apocalyptic number.

It is an amenable number.

21220322031233 is a deficient number, since it is larger than the sum of its proper divisors (1632332463955).

21220322031233 is a wasteful number, since it uses less digits than its factorization.

21220322031233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632332463954.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21220322031233 its reverse (33213022302212), we get a palindrome (54433344333445).

The spelling of 21220322031233 in words is "twenty-one trillion, two hundred twenty billion, three hundred twenty-two million, thirty-one thousand, two hundred thirty-three".