3102210221 has 6 divisors (see below), whose sum is σ = 3409867566. Its totient is φ = 2820191000.

The previous prime is 3102210211. The next prime is 3102210227. The reversal of 3102210221 is 1220122013.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2059888996 + 1042321225 = 45386^2 + 32285^2 .

It is not a de Polignac number, because 3102210221 - 2¹⁸ = 3101948077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3102210196 and 3102210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3102210227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12818930 + ... + 12819171.

It is an arithmetic number, because the mean of its divisors is an integer number (568311261).

Almost surely, 2^3102210221 is an apocalyptic number.

It is an amenable number.

3102210221 is a deficient number, since it is larger than the sum of its proper divisors (307657345).

3102210221 is a wasteful number, since it uses less digits than its factorization.

3102210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25638123 (or 25638112 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 3102210221 is about 55697.4884622278. The cubic root of 3102210221 is about 1458.4461828217.

Adding to 3102210221 its reverse (1220122013), we get a palindrome (4322332234).

The spelling of 3102210221 in words is "three billion, one hundred two million, two hundred ten thousand, two hundred twenty-one".