123021330 has 64 divisors (see below), whose sum is σ = 306892800. Its totient is φ = 31527360.

The previous prime is 123021307. The next prime is 123021331. The reversal of 123021330 is 33120321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (123021331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166101 + ... + 166839.

It is an arithmetic number, because the mean of its divisors is an integer number (4795200).

Almost surely, 2^123021330 is an apocalyptic number.

123021330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123021330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153446400).

123021330 is an abundant number, since it is smaller than the sum of its proper divisors (183871470).

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

123021330 is a wasteful number, since it uses less digits than its factorization.

123021330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 123021330 is about 11091.4980953882. The cubic root of 123021330 is about 497.3477291285.

Adding to 123021330 its reverse (33120321), we get a palindrome (156141651).

The spelling of 123021330 in words is "one hundred twenty-three million, twenty-one thousand, three hundred thirty".