1323123112020 has 96 divisors (see below), whose sum is σ = 3769780968576. Its totient is φ = 346652121600.

The previous prime is 1323123112009. The next prime is 1323123112037. The reversal of 1323123112020 is 202113213231.

It is a super-2 number, since 2×1323123112020² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3003715 + ... + 3415925.

It is an arithmetic number, because the mean of its divisors is an integer number (39268551756).

Almost surely, 2^{1323123112020} is an apocalyptic number.

1323123112020 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 1323123112020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1884890484288).

1323123112020 is an abundant number, since it is smaller than the sum of its proper divisors (2446657856556).

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

1323123112020 is a wasteful number, since it uses less digits than its factorization.

1323123112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413161 (or 413159 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1323123112020 its reverse (202113213231), we get a palindrome (1525236325251).

The spelling of 1323123112020 in words is "one trillion, three hundred twenty-three billion, one hundred twenty-three million, one hundred twelve thousand, twenty".