102302021 has 4 divisors (see below), whose sum is σ = 102595500. Its totient is φ = 102008544.

The previous prime is 102302017. The next prime is 102302041. The reversal of 102302021 is 120203201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75933796 + 26368225 = 8714^2 + 5135^2 .

It is a cyclic number.

It is not a de Polignac number, because 102302021 - 2² = 102302017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102301993 and 102302011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102302041) 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, 146216 + ... + 146913.

It is an arithmetic number, because the mean of its divisors is an integer number (25648875).

Almost surely, 2^102302021 is an apocalyptic number.

It is an amenable number.

102302021 is a deficient number, since it is larger than the sum of its proper divisors (293479).

102302021 is an equidigital number, since it uses as much as digits as its factorization.

102302021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293478.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 102302021 is about 10114.4461538930. The cubic root of 102302021 is about 467.6935757406.

Adding to 102302021 its reverse (120203201), we get a palindrome (222505222).

The spelling of 102302021 in words is "one hundred two million, three hundred two thousand, twenty-one".