123331123020 has 192 divisors, whose sum is σ = 414099818496. Its totient is φ = 26814965760.

The previous prime is 123331123007. The next prime is 123331123021. The reversal of 123331123020 is 20321133321.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (123331123021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1713192 + ... + 1783728.

It is an arithmetic number, because the mean of its divisors is an integer number (2156769888).

Almost surely, 2^123331123020 is an apocalyptic number.

123331123020 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 123331123020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207049909248).

123331123020 is an abundant number, since it is smaller than the sum of its proper divisors (290768695476).

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

123331123020 is a wasteful number, since it uses less digits than its factorization.

123331123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70760 (or 70758 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 123331123020 its reverse (20321133321), we get a palindrome (143652256341).

The spelling of 123331123020 in words is "one hundred twenty-three billion, three hundred thirty-one million, one hundred twenty-three thousand, twenty".