122555321123440 has 20 divisors (see below), whose sum is σ = 284941121612184. Its totient is φ = 49022128449344.

The previous prime is 122555321123429. The next prime is 122555321123467. The reversal of 122555321123440 is 44321123555221.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 122555321123393 and 122555321123402.

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, 765970756942 + ... + 765970757101.

Almost surely, 2^{122555321123440} is an apocalyptic number.

122555321123440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122555321123440 is an abundant number, since it is smaller than the sum of its proper divisors (162385800488744).

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

122555321123440 is a wasteful number, since it uses less digits than its factorization.

122555321123440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531941514056 (or 1531941514050 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 122555321123440 its reverse (44321123555221), we get a palindrome (166876444678661).

The spelling of 122555321123440 in words is "one hundred twenty-two trillion, five hundred fifty-five billion, three hundred twenty-one million, one hundred twenty-three thousand, four hundred forty".