123031132135442 has 16 divisors (see below), whose sum is σ = 185202939210840. Its totient is φ = 61297207260288.

The previous prime is 123031132135433. The next prime is 123031132135481. The reversal of 123031132135442 is 244531231130321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 83688117830641 + 39343014304801 = 9148121^2 + 6272401^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96414353 + ... + 97682084.

Almost surely, 2^{123031132135442} is an apocalyptic number.

123031132135442 is a deficient number, since it is larger than the sum of its proper divisors (62171807075398).

123031132135442 is a wasteful number, since it uses less digits than its factorization.

123031132135442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194097565.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 123031132135442 its reverse (244531231130321), we get a palindrome (367562363265763).

The spelling of 123031132135442 in words is "one hundred twenty-three trillion, thirty-one billion, one hundred thirty-two million, one hundred thirty-five thousand, four hundred forty-two".