102030321 has 4 divisors (see below), whose sum is σ = 136040432. Its totient is φ = 68020212.

The previous prime is 102030319. The next prime is 102030329. The reversal of 102030321 is 123030201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 102030321 - 2¹ = 102030319 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102030297 and 102030306.

It is not an unprimeable number, because it can be changed into a prime (102030329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17005051 + ... + 17005056.

It is an arithmetic number, because the mean of its divisors is an integer number (34010108).

Almost surely, 2^102030321 is an apocalyptic number.

It is an amenable number.

102030321 is a deficient number, since it is larger than the sum of its proper divisors (34010111).

102030321 is an equidigital number, since it uses as much as digits as its factorization.

102030321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34010110.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 102030321 is about 10101.0059400042. The cubic root of 102030321 is about 467.2791655296.

Adding to 102030321 its reverse (123030201), we get a palindrome (225060522).

The spelling of 102030321 in words is "one hundred two million, thirty thousand, three hundred twenty-one".