1323111101020 has 24 divisors (see below), whose sum is σ = 2817667587168. Its totient is φ = 521790292800.

The previous prime is 1323111100981. The next prime is 1323111101047. The reversal of 1323111101020 is 201011113231.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1323111100985 and 1323111101003.

It is a congruent number.

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, 465882771 + ... + 465885610.

It is an arithmetic number, because the mean of its divisors is an integer number (117402816132).

Almost surely, 2^{1323111101020} is an apocalyptic number.

1323111101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323111101020 is an abundant number, since it is smaller than the sum of its proper divisors (1494556486148).

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

1323111101020 is a wasteful number, since it uses less digits than its factorization.

1323111101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931768461 (or 931768459 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1323111101020 its reverse (201011113231), we get a palindrome (1524122214251).

The spelling of 1323111101020 in words is "one trillion, three hundred twenty-three billion, one hundred eleven million, one hundred one thousand, twenty".