1020302321 has 2 divisors, whose sum is σ = 1020302322. Its totient is φ = 1020302320.

The previous prime is 1020302267. The next prime is 1020302329. The reversal of 1020302321 is 1232030201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 687750625 + 332551696 = 26225^2 + 18236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020302321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020302296 and 1020302305.

It is not a weakly prime, because it can be changed into another prime (1020302329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510151160 + 510151161.

It is an arithmetic number, because the mean of its divisors is an integer number (510151161).

Almost surely, 2^1020302321 is an apocalyptic number.

It is an amenable number.

1020302321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020302321 is an equidigital number, since it uses as much as digits as its factorization.

1020302321 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 1020302321 is about 31942.1715135336. The cubic root of 1020302321 is about 1006.7221517571.

Adding to 1020302321 its reverse (1232030201), we get a palindrome (2252332522).

The spelling of 1020302321 in words is "one billion, twenty million, three hundred two thousand, three hundred twenty-one".