123033220 has 12 divisors (see below), whose sum is σ = 258369804. Its totient is φ = 49213280.

The previous prime is 123033217. The next prime is 123033221. The reversal of 123033220 is 22330321.

It can be written as a sum of positive squares in 2 ways, for example, as 25260676 + 97772544 = 5026^2 + 9888^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123033194 and 123033203.

It is not an unprimeable number, because it can be changed into a prime (123033221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3075811 + ... + 3075850.

It is an arithmetic number, because the mean of its divisors is an integer number (21530817).

Almost surely, 2^123033220 is an apocalyptic number.

123033220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123033220 is an abundant number, since it is smaller than the sum of its proper divisors (135336584).

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

123033220 is a wasteful number, since it uses less digits than its factorization.

123033220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6151670 (or 6151668 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 123033220 is about 11092.0340785629. The cubic root of 123033220 is about 497.3637514827.

Adding to 123033220 its reverse (22330321), we get a palindrome (145363541).

The spelling of 123033220 in words is "one hundred twenty-three million, thirty-three thousand, two hundred twenty".