123531021531343 has 2 divisors, whose sum is σ = 123531021531344. Its totient is φ = 123531021531342.

The previous prime is 123531021531341. The next prime is 123531021531383. The reversal of 123531021531343 is 343135120135321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123531021531343 - 2¹ = 123531021531341 is a prime.

Together with 123531021531341, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123531021531341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61765510765671 + 61765510765672.

It is an arithmetic number, because the mean of its divisors is an integer number (61765510765672).

Almost surely, 2^{123531021531343} is an apocalyptic number.

123531021531343 is a deficient number, since it is larger than the sum of its proper divisors (1).

123531021531343 is an equidigital number, since it uses as much as digits as its factorization.

123531021531343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 37.

Adding to 123531021531343 its reverse (343135120135321), we get a palindrome (466666141666664).

The spelling of 123531021531343 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, twenty-one million, five hundred thirty-one thousand, three hundred forty-three".