3102021221 has 8 divisors (see below), whose sum is σ = 3455833080. Its totient is φ = 2764665792.

The previous prime is 3102021211. The next prime is 3102021239. The reversal of 3102021221 is 1221202013.

It is a happy number.

3102021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 204890596 + 2897130625 = 14314^2 + 53825^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3102021221 - 2¹⁰ = 3102020197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3102021196 and 3102021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3102021211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4113710 + ... + 4114463.

It is an arithmetic number, because the mean of its divisors is an integer number (431979135).

Almost surely, 2^3102021221 is an apocalyptic number.

It is an amenable number.

3102021221 is a deficient number, since it is larger than the sum of its proper divisors (353811859).

3102021221 is a wasteful number, since it uses less digits than its factorization.

3102021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8228215.

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

The square root of 3102021221 is about 55695.7917710126. The cubic root of 3102021221 is about 1458.4165639471.

Adding to 3102021221 its reverse (1221202013), we get a palindrome (4323223234).

The spelling of 3102021221 in words is "three billion, one hundred two million, twenty-one thousand, two hundred twenty-one".