2130121321 has 8 divisors (see below), whose sum is σ = 2200863744. Its totient is φ = 2059505760.

The previous prime is 2130121297. The next prime is 2130121337. The reversal of 2130121321 is 1231210312.

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 2130121321 - 2⁷ = 2130121193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130121295 and 2130121304.

It is not an unprimeable number, because it can be changed into a prime (2130121391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3045 + ... + 65341.

It is an arithmetic number, because the mean of its divisors is an integer number (275107968).

Almost surely, 2^2130121321 is an apocalyptic number.

It is an amenable number.

2130121321 is a deficient number, since it is larger than the sum of its proper divisors (70742423).

2130121321 is a wasteful number, since it uses less digits than its factorization.

2130121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63431.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2130121321 is about 46153.2373837416. The cubic root of 2130121321 is about 1286.6727791582.

Adding to 2130121321 its reverse (1231210312), we get a palindrome (3361331633).

The spelling of 2130121321 in words is "two billion, one hundred thirty million, one hundred twenty-one thousand, three hundred twenty-one".