123456222120 has 128 divisors (see below), whose sum is σ = 461758371840. Its totient is φ = 25653239040.

The previous prime is 123456222091. The next prime is 123456222151. The reversal of 123456222120 is 21222654321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6671292 + ... + 6689771.

It is an arithmetic number, because the mean of its divisors is an integer number (3607487280).

Almost surely, 2^123456222120 is an apocalyptic number.

123456222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123456222120 is an abundant number, since it is smaller than the sum of its proper divisors (338302149720).

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

123456222120 is a wasteful number, since it uses less digits than its factorization.

123456222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13361095 (or 13361091 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 123456222120 its reverse (21222654321), we get a palindrome (144678876441).

The spelling of 123456222120 in words is "one hundred twenty-three billion, four hundred fifty-six million, two hundred twenty-two thousand, one hundred twenty".