31232022230221 has 4 divisors (see below), whose sum is σ = 31289752401244. Its totient is φ = 31174292059200.

The previous prime is 31232022230219. The next prime is 31232022230231. The reversal of 31232022230221 is 12203222023213.

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 22392401307721 + 8839620922500 = 4732061^2 + 2973150^2 .

It is a cyclic number.

It is not a de Polignac number, because 31232022230221 - 2¹ = 31232022230219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31232022230231) 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, 28865084700 + ... + 28865085781.

It is an arithmetic number, because the mean of its divisors is an integer number (7822438100311).

Almost surely, 2^{31232022230221} is an apocalyptic number.

It is an amenable number.

31232022230221 is a deficient number, since it is larger than the sum of its proper divisors (57730171023).

31232022230221 is an equidigital number, since it uses as much as digits as its factorization.

31232022230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57730171022.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31232022230221 its reverse (12203222023213), we get a palindrome (43435244253434).

The spelling of 31232022230221 in words is "thirty-one trillion, two hundred thirty-two billion, twenty-two million, two hundred thirty thousand, two hundred twenty-one".