123321131120 has 40 divisors (see below), whose sum is σ = 312787234800. Its totient is φ = 44844047360.

The previous prime is 123321131119. The next prime is 123321131149. The reversal of 123321131120 is 21131123321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123321131092 and 123321131101.

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, 70067945 + ... + 70069704.

It is an arithmetic number, because the mean of its divisors is an integer number (7819680870).

Almost surely, 2^123321131120 is an apocalyptic number.

123321131120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123321131120 is an abundant number, since it is smaller than the sum of its proper divisors (189466103680).

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

123321131120 is a wasteful number, since it uses less digits than its factorization.

123321131120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140137673 (or 140137667 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123321131120 its reverse (21131123321), we get a palindrome (144452254441).

The spelling of 123321131120 in words is "one hundred twenty-three billion, three hundred twenty-one million, one hundred thirty-one thousand, one hundred twenty".