123330121220 has 12 divisors (see below), whose sum is σ = 258993254604. Its totient is φ = 49332048480.

The previous prime is 123330121219. The next prime is 123330121223. The reversal of 123330121220 is 22121033321.

It can be written as a sum of positive squares in 2 ways, for example, as 38727091264 + 84603029956 = 196792^2 + 290866^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 6166506061 = 123330121220 / (1 + 2 + 3 + 3 + 3 + 0 + 1 + 2 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 123330121192 and 123330121201.

It is not an unprimeable number, because it can be changed into a prime (123330121223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3083253011 + ... + 3083253050.

It is an arithmetic number, because the mean of its divisors is an integer number (21582771217).

Almost surely, 2^123330121220 is an apocalyptic number.

123330121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123330121220 is an abundant number, since it is smaller than the sum of its proper divisors (135663133384).

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

123330121220 is a wasteful number, since it uses less digits than its factorization.

123330121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6166506070 (or 6166506068 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123330121220 its reverse (22121033321), we get a palindrome (145451154541).

It can be divided in two parts, 1233301 and 21220, that added together give a palindrome (1254521).

The spelling of 123330121220 in words is "one hundred twenty-three billion, three hundred thirty million, one hundred twenty-one thousand, two hundred twenty".