123220042242340 has 24 divisors (see below), whose sum is σ = 258762298633272. Its totient is φ = 49287976911360.

The previous prime is 123220042242313. The next prime is 123220042242373. The reversal of 123220042242340 is 43242240022321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 64401941106724 + 58818101135616 = 8025082^2 + 7669296^2 .

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, 42773532 + ... + 45563308.

It is an arithmetic number, because the mean of its divisors is an integer number (10781762443053).

Almost surely, 2^{123220042242340} is an apocalyptic number.

123220042242340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123220042242340 is an abundant number, since it is smaller than the sum of its proper divisors (135542256390932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123220042242340 is a wasteful number, since it uses less digits than its factorization.

123220042242340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998207 (or 4998205 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 123220042242340 its reverse (43242240022321), we get a palindrome (166462282264661).

The spelling of 123220042242340 in words is "one hundred twenty-three trillion, two hundred twenty billion, forty-two million, two hundred forty-two thousand, three hundred forty".