123120504220 has 48 divisors (see below), whose sum is σ = 302361067008. Its totient is φ = 41231050560.

The previous prime is 123120504209. The next prime is 123120504233. The reversal of 123120504220 is 22405021321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 123120504191 and 123120504200.

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, 10219936 + ... + 10231975.

It is an arithmetic number, because the mean of its divisors is an integer number (6299188896).

Almost surely, 2^123120504220 is an apocalyptic number.

123120504220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123120504220 is an abundant number, since it is smaller than the sum of its proper divisors (179240562788).

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

123120504220 is a wasteful number, since it uses less digits than its factorization.

123120504220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20451970 (or 20451968 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 123120504220 its reverse (22405021321), we get a palindrome (145525525541).

The spelling of 123120504220 in words is "one hundred twenty-three billion, one hundred twenty million, five hundred four thousand, two hundred twenty".