123220444140 has 72 divisors (see below), whose sum is σ = 395755083360. Its totient is φ = 30925914624.

The previous prime is 123220444111. The next prime is 123220444159. The reversal of 123220444140 is 41444022321.

123220444140 is a `hidden beast` number, since 1 + 23 + 220 + 4 + 4 + 414 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20131000 + ... + 20137119.

It is an arithmetic number, because the mean of its divisors is an integer number (5496598380).

Almost surely, 2^123220444140 is an apocalyptic number.

123220444140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123220444140 is an abundant number, since it is smaller than the sum of its proper divisors (272534639220).

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

123220444140 is a wasteful number, since it uses less digits than its factorization.

123220444140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40268151 (or 40268146 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 123220444140 its reverse (41444022321), we get a palindrome (164664466461).

The spelling of 123220444140 in words is "one hundred twenty-three billion, two hundred twenty million, four hundred forty-four thousand, one hundred forty".