122543305120520 has 128 divisors (see below), whose sum is σ = 282786792986880. Its totient is φ = 47777910912000.

The previous prime is 122543305120519. The next prime is 122543305120529. The reversal of 122543305120520 is 25021503345221.

It is not an unprimeable number, because it can be changed into a prime (122543305120529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124493885 + ... + 125474355.

It is an arithmetic number, because the mean of its divisors is an integer number (2209271820210).

Almost surely, 2^{122543305120520} is an apocalyptic number.

122543305120520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122543305120520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141393396493440).

122543305120520 is an abundant number, since it is smaller than the sum of its proper divisors (160243487866360).

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

122543305120520 is a wasteful number, since it uses less digits than its factorization.

122543305120520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981007 (or 981003 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 122543305120520 its reverse (25021503345221), we get a palindrome (147564808465741).

The spelling of 122543305120520 in words is "one hundred twenty-two trillion, five hundred forty-three billion, three hundred five million, one hundred twenty thousand, five hundred twenty".