2101320120 has 64 divisors (see below), whose sum is σ = 6507325440. Its totient is φ = 542275200.

The previous prime is 2101320119. The next prime is 2101320149. The reversal of 2101320120 is 210231012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2101320096 and 2101320105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278716 + ... + 286155.

It is an arithmetic number, because the mean of its divisors is an integer number (101676960).

Almost surely, 2^2101320120 is an apocalyptic number.

2101320120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101320120 is an abundant number, since it is smaller than the sum of its proper divisors (4406005320).

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

2101320120 is a wasteful number, since it uses less digits than its factorization.

2101320120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564916 (or 564912 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2101320120 is about 45840.1583766898. The cubic root of 2101320120 is about 1280.8474449962.

Adding to 2101320120 its reverse (210231012), we get a palindrome (2311551132).

The spelling of 2101320120 in words is "two billion, one hundred one million, three hundred twenty thousand, one hundred twenty".