3201210221 has 4 divisors (see below), whose sum is σ = 3492229344. Its totient is φ = 2910191100.

The previous prime is 3201210203. The next prime is 3201210223. The reversal of 3201210221 is 1220121023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3201210221 - 2³⁰ = 2127468397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3201210196 and 3201210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3201210223) 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, 145509545 + ... + 145509566.

It is an arithmetic number, because the mean of its divisors is an integer number (873057336).

Almost surely, 2^3201210221 is an apocalyptic number.

It is an amenable number.

3201210221 is a deficient number, since it is larger than the sum of its proper divisors (291019123).

3201210221 is a wasteful number, since it uses less digits than its factorization.

3201210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291019122.

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

The square root of 3201210221 is about 56579.2384271828. The cubic root of 3201210221 is about 1473.7983465538.

Adding to 3201210221 its reverse (1220121023), we get a palindrome (4421331244).

It can be divided in two parts, 320121022 and 1, that added together give a palindrome (320121023).

The spelling of 3201210221 in words is "three billion, two hundred one million, two hundred ten thousand, two hundred twenty-one".