123220555120 has 80 divisors (see below), whose sum is σ = 321939519552. Its totient is φ = 43518689280.

The previous prime is 123220555109. The next prime is 123220555151. The reversal of 123220555120 is 21555022321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2551761 + ... + 2599600.

Almost surely, 2^123220555120 is an apocalyptic number.

123220555120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123220555120 is an abundant number, since it is smaller than the sum of its proper divisors (198718964432).

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

123220555120 is a wasteful number, since it uses less digits than its factorization.

123220555120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151410 (or 5151404 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 123220555120 its reverse (21555022321), we get a palindrome (144775577441).

The spelling of 123220555120 in words is "one hundred twenty-three billion, two hundred twenty million, five hundred fifty-five thousand, one hundred twenty".