2130202321 has 4 divisors (see below), whose sum is σ = 2294064052. Its totient is φ = 1966340592.

The previous prime is 2130202307. The next prime is 2130202381. The reversal of 2130202321 is 1232020312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1232361025 + 897841296 = 35105^2 + 29964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2130202321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130202295 and 2130202304.

It is not an unprimeable number, because it can be changed into a prime (2130202301) 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 3 ways as a sum of consecutive naturals, for example, 81930846 + ... + 81930871.

It is an arithmetic number, because the mean of its divisors is an integer number (573516013).

Almost surely, 2^2130202321 is an apocalyptic number.

It is an amenable number.

2130202321 is a deficient number, since it is larger than the sum of its proper divisors (163861731).

2130202321 is a wasteful number, since it uses less digits than its factorization.

2130202321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163861730.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2130202321 is about 46154.1148869741. The cubic root of 2130202321 is about 1286.6890879592.

Adding to 2130202321 its reverse (1232020312), we get a palindrome (3362222633).

The spelling of 2130202321 in words is "two billion, one hundred thirty million, two hundred two thousand, three hundred twenty-one".