102021321 has 8 divisors (see below), whose sum is σ = 139705024. Its totient is φ = 66175920.

The previous prime is 102021299. The next prime is 102021329. The reversal of 102021321 is 123120201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102021321 - 2⁵ = 102021289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021297 and 102021306.

It is not an unprimeable number, because it can be changed into a prime (102021329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459445 + ... + 459666.

It is an arithmetic number, because the mean of its divisors is an integer number (17463128).

Almost surely, 2^102021321 is an apocalyptic number.

It is an amenable number.

102021321 is a deficient number, since it is larger than the sum of its proper divisors (37683703).

102021321 is an equidigital number, since it uses as much as digits as its factorization.

102021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919151.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 102021321 is about 10100.5604299960. The cubic root of 102021321 is about 467.2654257050.

Adding to 102021321 its reverse (123120201), we get a palindrome (225141522).

The spelling of 102021321 in words is "one hundred two million, twenty-one thousand, three hundred twenty-one".