231222223213220 has 12 divisors (see below), whose sum is σ = 485566668747804. Its totient is φ = 92488889285280.

The previous prime is 231222223213213. The next prime is 231222223213249. The reversal of 231222223213220 is 22312322222132.

231222223213220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40257020004964 + 190965203208256 = 6344842^2 + 13819016^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5780555580311 + ... + 5780555580350.

It is an arithmetic number, because the mean of its divisors is an integer number (40463889062317).

Almost surely, 2^{231222223213220} is an apocalyptic number.

231222223213220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231222223213220 is an abundant number, since it is smaller than the sum of its proper divisors (254344445534584).

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

231222223213220 is a wasteful number, since it uses less digits than its factorization.

231222223213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11561111160670 (or 11561111160668 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 231222223213220 its reverse (22312322222132), we get a palindrome (253534545435352).

The spelling of 231222223213220 in words is "two hundred thirty-one trillion, two hundred twenty-two billion, two hundred twenty-three million, two hundred thirteen thousand, two hundred twenty".