123231042020 has 24 divisors (see below), whose sum is σ = 258795696768. Its totient is φ = 49290415200.

The previous prime is 123231042017. The next prime is 123231042031. The reversal of 123231042020 is 20240132321.

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 = 123231041983 and 123231042001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442565 + ... + 665075.

It is an arithmetic number, because the mean of its divisors is an integer number (10783154032).

Almost surely, 2^123231042020 is an apocalyptic number.

123231042020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123231042020 is an abundant number, since it is smaller than the sum of its proper divisors (135564654748).

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

123231042020 is a wasteful number, since it uses less digits than its factorization.

123231042020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250211 (or 250209 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 123231042020 its reverse (20240132321), we get a palindrome (143471174341).

The spelling of 123231042020 in words is "one hundred twenty-three billion, two hundred thirty-one million, forty-two thousand, twenty".