231221221213322 has 16 divisors (see below), whose sum is σ = 367234022876040. Its totient is φ = 108809892054528.

The previous prime is 231221221213313. The next prime is 231221221213327. The reversal of 231221221213322 is 223312122122132.

It can be written as a sum of positive squares in 4 ways, for example, as 231211761511201 + 9459702121 = 15205649^2 + 97261^2 .

It is not an unprimeable number, because it can be changed into a prime (231221221213327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51248054 + ... + 55577022.

Almost surely, 2^{231221221213322} is an apocalyptic number.

231221221213322 is a deficient number, since it is larger than the sum of its proper divisors (136012801662718).

231221221213322 is a wasteful number, since it uses less digits than its factorization.

231221221213322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5899945.

The product of its digits is 6912, while the sum is 29.

Adding to 231221221213322 its reverse (223312122122132), we get a palindrome (454533343335454).

The spelling of 231221221213322 in words is "two hundred thirty-one trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred thirteen thousand, three hundred twenty-two".