231144122323220 has 12 divisors (see below), whose sum is σ = 485402656878804. Its totient is φ = 92457648929280.

The previous prime is 231144122323217. The next prime is 231144122323379. The reversal of 231144122323220 is 22323221441132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 69409926512644 + 161734195810576 = 8331262^2 + 12717476^2 .

It is a congruent number.

It is an unprimeable number.

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, 5778603058061 + ... + 5778603058100.

It is an arithmetic number, because the mean of its divisors is an integer number (40450221406567).

Almost surely, 2^{231144122323220} is an apocalyptic number.

231144122323220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231144122323220 is an abundant number, since it is smaller than the sum of its proper divisors (254258534555584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231144122323220 is a wasteful number, since it uses less digits than its factorization.

231144122323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11557206116170 (or 11557206116168 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 231144122323220 its reverse (22323221441132), we get a palindrome (253467343764352).

The spelling of 231144122323220 in words is "two hundred thirty-one trillion, one hundred forty-four billion, one hundred twenty-two million, three hundred twenty-three thousand, two hundred twenty".