3621340221 has 12 divisors (see below), whose sum is σ = 5129188992. Its totient is φ = 2272212928.

The previous prime is 3621340123. The next prime is 3621340243. The reversal of 3621340221 is 1220431263.

It is not a de Polignac number, because 3621340221 - 2¹⁴ = 3621323837 is a prime.

It is a super-2 number, since 2×3621340221² = 26228209992464657682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3621340191 and 3621340200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621340721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2087565 + ... + 2089298.

It is an arithmetic number, because the mean of its divisors is an integer number (427432416).

Almost surely, 2^3621340221 is an apocalyptic number.

It is an amenable number.

3621340221 is a deficient number, since it is larger than the sum of its proper divisors (1507848771).

3621340221 is a wasteful number, since it uses less digits than its factorization.

3621340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4176900 (or 4176883 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 3621340221 is about 60177.5724086640. The cubic root of 3621340221 is about 1535.6412732253.

Adding to 3621340221 its reverse (1220431263), we get a palindrome (4841771484).

The spelling of 3621340221 in words is "three billion, six hundred twenty-one million, three hundred forty thousand, two hundred twenty-one".