123531021531443 has 8 divisors (see below), whose sum is σ = 124589394267648. Its totient is φ = 122473987663104.

The previous prime is 123531021531431. The next prime is 123531021531461. The reversal of 123531021531443 is 344135120135321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 123531021531443 - 2¹⁰ = 123531021530419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123531021531397 and 123531021531406.

It is not an unprimeable number, because it can be changed into a prime (123531021531343) 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 7 ways as a sum of consecutive naturals, for example, 334531646 + ... + 334900707.

It is an arithmetic number, because the mean of its divisors is an integer number (15573674283456).

Almost surely, 2^{123531021531443} is an apocalyptic number.

123531021531443 is a deficient number, since it is larger than the sum of its proper divisors (1058372736205).

123531021531443 is a wasteful number, since it uses less digits than its factorization.

123531021531443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669433933.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 123531021531443 its reverse (344135120135321), we get a palindrome (467666141666764).

The spelling of 123531021531443 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, twenty-one million, five hundred thirty-one thousand, four hundred forty-three".