123321644120 has 32 divisors (see below), whose sum is σ = 293795683200. Its totient is φ = 46426971648.

The previous prime is 123321644107. The next prime is 123321644129. The reversal of 123321644120 is 21446123321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123321644129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90677000 + ... + 90678359.

It is an arithmetic number, because the mean of its divisors is an integer number (9181115100).

Almost surely, 2^123321644120 is an apocalyptic number.

123321644120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123321644120 is an abundant number, since it is smaller than the sum of its proper divisors (170474039080).

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

123321644120 is a wasteful number, since it uses less digits than its factorization.

123321644120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181355387 (or 181355383 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 123321644120 its reverse (21446123321), we get a palindrome (144767767441).

The spelling of 123321644120 in words is "one hundred twenty-three billion, three hundred twenty-one million, six hundred forty-four thousand, one hundred twenty".