123312020 has 48 divisors (see below), whose sum is σ = 284836608. Its totient is φ = 44557440.

The previous prime is 123312001. The next prime is 123312023. The reversal of 123312020 is 20213321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 123311986 and 123312004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123312023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7175 + ... + 17265.

It is an arithmetic number, because the mean of its divisors is an integer number (5934096).

Almost surely, 2^123312020 is an apocalyptic number.

123312020 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 123312020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142418304).

123312020 is an abundant number, since it is smaller than the sum of its proper divisors (161524588).

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

123312020 is a wasteful number, since it uses less digits than its factorization.

123312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10160 (or 10158 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 123312020 is about 11104.5945446018. The cubic root of 123312020 is about 497.7391525458.

Adding to 123312020 its reverse (20213321), we get a palindrome (143525341).

The spelling of 123312020 in words is "one hundred twenty-three million, three hundred twelve thousand, twenty".