123143533405342 has 4 divisors (see below), whose sum is σ = 184715300108016. Its totient is φ = 61571766702670.

The previous prime is 123143533405271. The next prime is 123143533405351. The reversal of 123143533405342 is 243504335341321.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30785883351334 + ... + 30785883351337.

It is an arithmetic number, because the mean of its divisors is an integer number (46178825027004).

Almost surely, 2^{123143533405342} is an apocalyptic number.

123143533405342 is a deficient number, since it is larger than the sum of its proper divisors (61571766702674).

123143533405342 is an equidigital number, since it uses as much as digits as its factorization.

123143533405342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61571766702673.

The product of its (nonzero) digits is 1555200, while the sum is 43.

Adding to 123143533405342 its reverse (243504335341321), we get a palindrome (366647868746663).

The spelling of 123143533405342 in words is "one hundred twenty-three trillion, one hundred forty-three billion, five hundred thirty-three million, four hundred five thousand, three hundred forty-two".