123115200340 has 24 divisors (see below), whose sum is σ = 282045732192. Its totient is φ = 44769163680.

The previous prime is 123115200323. The next prime is 123115200367. The reversal of 123115200340 is 43002511321.

It is a happy number.

It is a super-2 number, since 2×123115200340² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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, 279807054 + ... + 279807493.

It is an arithmetic number, because the mean of its divisors is an integer number (11751905508).

Almost surely, 2^123115200340 is an apocalyptic number.

123115200340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123115200340 is an abundant number, since it is smaller than the sum of its proper divisors (158930531852).

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

123115200340 is a wasteful number, since it uses less digits than its factorization.

123115200340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559614567 (or 559614565 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 123115200340 its reverse (43002511321), we get a palindrome (166117711661).

The spelling of 123115200340 in words is "one hundred twenty-three billion, one hundred fifteen million, two hundred thousand, three hundred forty".