1233123320 has 128 divisors (see below), whose sum is σ = 3279407040. Its totient is φ = 411402240.

The previous prime is 1233123289. The next prime is 1233123329. The reversal of 1233123320 is 233213321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1233123292 and 1233123301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233123329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1103402 + ... + 1104518.

Almost surely, 2^1233123320 is an apocalyptic number.

1233123320 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 1233123320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1639703520).

1233123320 is an abundant number, since it is smaller than the sum of its proper divisors (2046283720).

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

1233123320 is a wasteful number, since it uses less digits than its factorization.

1233123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345 (or 1341 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1233123320 is about 35115.8556780267. The cubic root of 1233123320 is about 1072.3474012362.

Adding to 1233123320 its reverse (233213321), we get a palindrome (1466336641).

Subtracting from 1233123320 its reverse (233213321), we obtain a palindrome (999909999).

The spelling of 1233123320 in words is "one billion, two hundred thirty-three million, one hundred twenty-three thousand, three hundred twenty".