231520123401133 has 16 divisors (see below), whose sum is σ = 264879602539776. Its totient is φ = 198231944578560.

The previous prime is 231520123401113. The next prime is 231520123401139. The reversal of 231520123401133 is 331104321025132.

It is a cyclic number.

It is not a de Polignac number, because 231520123401133 - 2²¹ = 231520121303981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231520123401095 and 231520123401104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231520123401139) 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, 512130685 + ... + 512582557.

It is an arithmetic number, because the mean of its divisors is an integer number (16554975158736).

Almost surely, 2^{231520123401133} is an apocalyptic number.

It is an amenable number.

231520123401133 is a deficient number, since it is larger than the sum of its proper divisors (33359479138643).

231520123401133 is an equidigital number, since it uses as much as digits as its factorization.

231520123401133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530604.

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 231520123401133 its reverse (331104321025132), we get a palindrome (562624444426265).

The spelling of 231520123401133 in words is "two hundred thirty-one trillion, five hundred twenty billion, one hundred twenty-three million, four hundred one thousand, one hundred thirty-three".