102302302021 has 4 divisors (see below), whose sum is σ = 102353532012. Its totient is φ = 102251072032.

The previous prime is 102302302009. The next prime is 102302302043. The reversal of 102302302021 is 120203203201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120203203201 = 19 ⋅6326484379.

It can be written as a sum of positive squares in 2 ways, for example, as 3337950625 + 98964351396 = 57775^2 + 314586^2 .

It is a cyclic number.

It is not a de Polignac number, because 102302302021 - 2⁹ = 102302301509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102302301986 and 102302302004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102302302061) 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, 25612000 + ... + 25615993.

It is an arithmetic number, because the mean of its divisors is an integer number (25588383003).

Almost surely, 2^102302302021 is an apocalyptic number.

It is an amenable number.

102302302021 is a deficient number, since it is larger than the sum of its proper divisors (51229991).

102302302021 is an equidigital number, since it uses as much as digits as its factorization.

102302302021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51229990.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 102302302021 its reverse (120203203201), we get a palindrome (222505505222).

The spelling of 102302302021 in words is "one hundred two billion, three hundred two million, three hundred two thousand, twenty-one".