2102030321 has 2 divisors, whose sum is σ = 2102030322. Its totient is φ = 2102030320.

The previous prime is 2102030311. The next prime is 2102030339. The reversal of 2102030321 is 1230302012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1945780321 + 156250000 = 44111^2 + 12500^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102030321 - 2⁶ = 2102030257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2102030296 and 2102030305.

It is not a weakly prime, because it can be changed into another prime (2102030311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051015160 + 1051015161.

It is an arithmetic number, because the mean of its divisors is an integer number (1051015161).

Almost surely, 2^2102030321 is an apocalyptic number.

It is an amenable number.

2102030321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102030321 is an equidigital number, since it uses as much as digits as its factorization.

2102030321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2102030321 is about 45847.9042160053. The cubic root of 2102030321 is about 1280.9917283708.

Adding to 2102030321 its reverse (1230302012), we get a palindrome (3332332333).

The spelling of 2102030321 in words is "two billion, one hundred two million, thirty thousand, three hundred twenty-one".