102003130321 has 2 divisors, whose sum is σ = 102003130322. Its totient is φ = 102003130320.

The previous prime is 102003130301. The next prime is 102003130349. The reversal of 102003130321 is 123031300201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101038158225 + 964972096 = 317865^2 + 31064^2 .

It is a cyclic number.

It is not a de Polignac number, because 102003130321 - 2¹¹ = 102003128273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102003130295 and 102003130304.

It is not a weakly prime, because it can be changed into another prime (102003130301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51001565160 + 51001565161.

It is an arithmetic number, because the mean of its divisors is an integer number (51001565161).

Almost surely, 2^102003130321 is an apocalyptic number.

It is an amenable number.

102003130321 is a deficient number, since it is larger than the sum of its proper divisors (1).

102003130321 is an equidigital number, since it uses as much as digits as its factorization.

102003130321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 102003130321 its reverse (123031300201), we get a palindrome (225034430522).

It can be divided in two parts, 102003 and 130321, that added together give a square (232324 = 482²).

The spelling of 102003130321 in words is "one hundred two billion, three million, one hundred thirty thousand, three hundred twenty-one".