123303213220 has 72 divisors (see below), whose sum is σ = 285839262072. Its totient is φ = 44644892160.

The previous prime is 123303213199. The next prime is 123303213223. The reversal of 123303213220 is 22312303321.

123303213220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 25489399716 + 97813813504 = 159654^2 + 312752^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 123303213191 and 123303213200.

It is not an unprimeable number, because it can be changed into a prime (123303213223) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 454522 + ... + 673198.

It is an arithmetic number, because the mean of its divisors is an integer number (3969989751).

Almost surely, 2^123303213220 is an apocalyptic number.

123303213220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123303213220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142919631036).

123303213220 is an abundant number, since it is smaller than the sum of its proper divisors (162536048852).

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

123303213220 is a wasteful number, since it uses less digits than its factorization.

123303213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218941 (or 218928 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 123303213220 its reverse (22312303321), we get a palindrome (145615516541).

The spelling of 123303213220 in words is "one hundred twenty-three billion, three hundred three million, two hundred thirteen thousand, two hundred twenty".