3102300231221 has 4 divisors (see below), whose sum is σ = 3102848637132. Its totient is φ = 3101751825312.

The previous prime is 3102300231187. The next prime is 3102300231311. The reversal of 3102300231221 is 1221320032013.

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 661800147121 + 2440500084100 = 813511^2 + 1562210^2 .

It is a cyclic number.

It is not a de Polignac number, because 3102300231221 - 2⁶ = 3102300231157 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 = 3102300231193 and 3102300231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3102300251221) 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, 274194470 + ... + 274205783.

It is an arithmetic number, because the mean of its divisors is an integer number (775712159283).

Almost surely, 2^{3102300231221} is an apocalyptic number.

It is an amenable number.

3102300231221 is a deficient number, since it is larger than the sum of its proper divisors (548405911).

3102300231221 is an equidigital number, since it uses as much as digits as its factorization.

3102300231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548405910.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 3102300231221 its reverse (1221320032013), we get a palindrome (4323620263234).

The spelling of 3102300231221 in words is "three trillion, one hundred two billion, three hundred million, two hundred thirty-one thousand, two hundred twenty-one".