231221313223 has 16 divisors (see below), whose sum is σ = 250288320384. Its totient is φ = 212771123200.

The previous prime is 231221313173. The next prime is 231221313227. The reversal of 231221313223 is 322313122132.

It is a cyclic number.

It is not a de Polignac number, because 231221313223 - 2⁹ = 231221312711 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 (231221313227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632523 + ... + 928723.

It is an arithmetic number, because the mean of its divisors is an integer number (15643020024).

Almost surely, 2^231221313223 is an apocalyptic number.

231221313223 is a deficient number, since it is larger than the sum of its proper divisors (19067007161).

231221313223 is a wasteful number, since it uses less digits than its factorization.

231221313223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297242.

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

Adding to 231221313223 its reverse (322313122132), we get a palindrome (553534435355).

The spelling of 231221313223 in words is "two hundred thirty-one billion, two hundred twenty-one million, three hundred thirteen thousand, two hundred twenty-three".