2101320321120 has 192 divisors, whose sum is σ = 7364297062080. Its totient is φ = 559614873600.

The previous prime is 2101320321077. The next prime is 2101320321161. The reversal of 2101320321120 is 211230231012.

2101320321120 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 320 + 321 + 1 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2101320321093 and 2101320321102.

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, 2967930 + ... + 3607110.

It is an arithmetic number, because the mean of its divisors is an integer number (38355713865).

Almost surely, 2^{2101320321120} is an apocalyptic number.

2101320321120 is a gapful number since it is divisible by the number (20) 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 2101320321120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3682148531040).

2101320321120 is an abundant number, since it is smaller than the sum of its proper divisors (5262976740960).

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

2101320321120 is a wasteful number, since it uses less digits than its factorization.

2101320321120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639966 (or 639952 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2101320321120 its reverse (211230231012), we get a palindrome (2312550552132).

The spelling of 2101320321120 in words is "two trillion, one hundred one billion, three hundred twenty million, three hundred twenty-one thousand, one hundred twenty".