3102220321 has 4 divisors (see below), whose sum is σ = 3102398532. Its totient is φ = 3102042112.

The previous prime is 3102220271. The next prime is 3102220339. The reversal of 3102220321 is 1230222013.

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 2645970721 + 456249600 = 51439^2 + 21360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3102220321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3102220295 and 3102220304.

It is not an unprimeable number, because it can be changed into a prime (3102220391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59776 + ... + 98881.

It is an arithmetic number, because the mean of its divisors is an integer number (775599633).

Almost surely, 2^3102220321 is an apocalyptic number.

It is an amenable number.

3102220321 is a deficient number, since it is larger than the sum of its proper divisors (178211).

3102220321 is a wasteful number, since it uses less digits than its factorization.

3102220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178210.

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

The square root of 3102220321 is about 55697.5791305152. The cubic root of 3102220321 is about 1458.4477655954.

Adding to 3102220321 its reverse (1230222013), we get a palindrome (4332442334).

The spelling of 3102220321 in words is "three billion, one hundred two million, two hundred twenty thousand, three hundred twenty-one".