3210220221 has 128 divisors (see below), whose sum is σ = 5332992000. Its totient is φ = 1698278400.

The previous prime is 3210220217. The next prime is 3210220231. The reversal of 3210220221 is 1220220123.

It is a happy number.

It is not a de Polignac number, because 3210220221 - 2² = 3210220217 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3210220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3210220231) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 40635660 + ... + 40635738.

It is an arithmetic number, because the mean of its divisors is an integer number (41664000).

Almost surely, 2^3210220221 is an apocalyptic number.

3210220221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3210220221 is a deficient number, since it is larger than the sum of its proper divisors (2122771779).

3210220221 is a wasteful number, since it uses less digits than its factorization.

3210220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 3210220221 is about 56658.8053262686. The cubic root of 3210220221 is about 1475.1797495774.

Adding to 3210220221 its reverse (1220220123), we get a palindrome (4430440344).

The spelling of 3210220221 in words is "three billion, two hundred ten million, two hundred twenty thousand, two hundred twenty-one".