123144134220340 has 12 divisors (see below), whose sum is σ = 258602681862756. Its totient is φ = 49257653688128.

The previous prime is 123144134220271. The next prime is 123144134220361. The reversal of 123144134220340 is 43022431441321.

It can be written as a sum of positive squares in 2 ways, for example, as 75154404458896 + 47989729761444 = 8669164^2 + 6927462^2 .

It is a super-2 number, since 2×123144134220340² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123144134220296 and 123144134220305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3078603355489 + ... + 3078603355528.

It is an arithmetic number, because the mean of its divisors is an integer number (21550223488563).

Almost surely, 2^{123144134220340} is an apocalyptic number.

123144134220340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123144134220340 is an abundant number, since it is smaller than the sum of its proper divisors (135458547642416).

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

123144134220340 is a wasteful number, since it uses less digits than its factorization.

123144134220340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6157206711026 (or 6157206711024 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 123144134220340 its reverse (43022431441321), we get a palindrome (166166565661661).

The spelling of 123144134220340 in words is "one hundred twenty-three trillion, one hundred forty-four billion, one hundred thirty-four million, two hundred twenty thousand, three hundred forty".