2130205021 has 8 divisors (see below), whose sum is σ = 2513053184. Its totient is φ = 1766990160.

The previous prime is 2130205003. The next prime is 2130205093. The reversal of 2130205021 is 1205020312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2130205021 - 2⁹ = 2130204509 is a prime.

It is a super-2 number, since 2×2130205021² = 9075546862987220882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130204986 and 2130205004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130205321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4908090 + ... + 4908523.

It is an arithmetic number, because the mean of its divisors is an integer number (314131648).

Almost surely, 2^2130205021 is an apocalyptic number.

It is an amenable number.

2130205021 is a deficient number, since it is larger than the sum of its proper divisors (382848163).

2130205021 is an equidigital number, since it uses as much as digits as its factorization.

2130205021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9816651.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2130205021 is about 46154.1441367945. The cubic root of 2130205021 is about 1286.6896315787.

Adding to 2130205021 its reverse (1205020312), we get a palindrome (3335225333).

The spelling of 2130205021 in words is "two billion, one hundred thirty million, two hundred five thousand, twenty-one".