20321122330231 has 4 divisors (see below), whose sum is σ = 20329088276464. Its totient is φ = 20313156384000.

The previous prime is 20321122330219. The next prime is 20321122330259. The reversal of 20321122330231 is 13203322112302.

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

It is a cyclic number.

It is not a de Polignac number, because 20321122330231 - 2¹¹ = 20321122328183 is a prime.

It is a super-2 number, since 2×20321122330231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20321122330196 and 20321122330205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321122333231) 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, 3982969290 + ... + 3982974391.

It is an arithmetic number, because the mean of its divisors is an integer number (5082272069116).

Almost surely, 2^{20321122330231} is an apocalyptic number.

20321122330231 is a deficient number, since it is larger than the sum of its proper divisors (7965946233).

20321122330231 is an equidigital number, since it uses as much as digits as its factorization.

20321122330231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7965946232.

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

Adding to 20321122330231 its reverse (13203322112302), we get a palindrome (33524444442533).

The spelling of 20321122330231 in words is "twenty trillion, three hundred twenty-one billion, one hundred twenty-two million, three hundred thirty thousand, two hundred thirty-one".