2120355000 has 120 divisors (see below), whose sum is σ = 7176140400. Its totient is φ = 565416000.

The previous prime is 2120354993. The next prime is 2120355001. The reversal of 2120355000 is 5530212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120355001) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 21441 + ... + 68559.

It is an arithmetic number, because the mean of its divisors is an integer number (59801170).

Almost surely, 2^2120355000 is an apocalyptic number.

2120355000 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 2120355000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3588070200).

2120355000 is an abundant number, since it is smaller than the sum of its proper divisors (5055785400).

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

2120355000 is a wasteful number, since it uses less digits than its factorization.

2120355000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47151 (or 47129 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 2120355000 is about 46047.3126251685. The cubic root of 2120355000 is about 1284.7033587794.

Adding to 2120355000 its reverse (5530212), we get a palindrome (2125885212).

The spelling of 2120355000 in words is "two billion, one hundred twenty million, three hundred fifty-five thousand".