231321344121 has 12 divisors (see below), whose sum is σ = 381863806272. Its totient is φ = 132183625176.

The previous prime is 231321344119. The next prime is 231321344129. The reversal of 231321344121 is 121443123132.

231321344121 is a `hidden beast` number, since 2 + 3 + 1 + 3 + 213 + 441 + 2 + 1 = 666.

It is not a de Polignac number, because 231321344121 - 2¹ = 231321344119 is a prime.

It is a super-2 number, since 2×231321344121² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231321344129) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1835883621 + ... + 1835883746.

It is an arithmetic number, because the mean of its divisors is an integer number (31821983856).

Almost surely, 2^231321344121 is an apocalyptic number.

231321344121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231321344121 is a deficient number, since it is larger than the sum of its proper divisors (150542462151).

231321344121 is a wasteful number, since it uses less digits than its factorization.

231321344121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671767380 (or 3671767377 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 231321344121 its reverse (121443123132), we get a palindrome (352764467253).

The spelling of 231321344121 in words is "two hundred thirty-one billion, three hundred twenty-one million, three hundred forty-four thousand, one hundred twenty-one".