123231020 has 48 divisors (see below), whose sum is σ = 284866848. Its totient is φ = 44405760.

The previous prime is 123231019. The next prime is 123231037. The reversal of 123231020 is 20132321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 123230986 and 123231004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22382 + ... + 27338.

It is an arithmetic number, because the mean of its divisors is an integer number (5934726).

Almost surely, 2^123231020 is an apocalyptic number.

123231020 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 123231020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142433424).

123231020 is an abundant number, since it is smaller than the sum of its proper divisors (161635828).

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

123231020 is a wasteful number, since it uses less digits than its factorization.

123231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090 (or 5088 counting only the distinct ones).

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

The square root of 123231020 is about 11100.9468064666. The cubic root of 123231020 is about 497.6301453238.

Adding to 123231020 its reverse (20132321), we get a palindrome (143363341).

The spelling of 123231020 in words is "one hundred twenty-three million, two hundred thirty-one thousand, twenty".