20233331312221 has 4 divisors (see below), whose sum is σ = 20345117673244. Its totient is φ = 20121544951200.

The previous prime is 20233331312167. The next prime is 20233331312239. The reversal of 20233331312221 is 12221313333202.

It is a happy number.

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 9691945749721 + 10541385562500 = 3113189^2 + 3246750^2 .

It is a cyclic number.

It is not a de Polignac number, because 20233331312221 - 2⁴³ = 11437238290013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20233331312221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20233331312281) 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, 55893180240 + ... + 55893180601.

It is an arithmetic number, because the mean of its divisors is an integer number (5086279418311).

Almost surely, 2^{20233331312221} is an apocalyptic number.

It is an amenable number.

20233331312221 is a deficient number, since it is larger than the sum of its proper divisors (111786361023).

20233331312221 is a wasteful number, since it uses less digits than its factorization.

20233331312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111786361022.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 20233331312221 its reverse (12221313333202), we get a palindrome (32454644645423).

The spelling of 20233331312221 in words is "twenty trillion, two hundred thirty-three billion, three hundred thirty-one million, three hundred twelve thousand, two hundred twenty-one".