231231232330221 has 8 divisors (see below), whose sum is σ = 308421201878944. Its totient is φ = 154097708834160.

The previous prime is 231231232330211. The next prime is 231231232330297. The reversal of 231231232330221 is 122033232132132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231231232330221 - 2¹³ = 231231232322029 is a prime.

It is a super-3 number, since 3×231231232330221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231231232330211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14111503606 + ... + 14111519991.

It is an arithmetic number, because the mean of its divisors is an integer number (38552650234868).

Almost surely, 2^{231231232330221} is an apocalyptic number.

It is an amenable number.

231231232330221 is a deficient number, since it is larger than the sum of its proper divisors (77189969548723).

231231232330221 is a wasteful number, since it uses less digits than its factorization.

231231232330221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28223026331.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 231231232330221 its reverse (122033232132132), we get a palindrome (353264464462353).

The spelling of 231231232330221 in words is "two hundred thirty-one trillion, two hundred thirty-one billion, two hundred thirty-two million, three hundred thirty thousand, two hundred twenty-one".