606012221 has 4 divisors (see below), whose sum is σ = 612012444. Its totient is φ = 600012000.

The previous prime is 606012179. The next prime is 606012223. The reversal of 606012221 is 122210606.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 389628121 + 216384100 = 19739^2 + 14710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-606012221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 606012193 and 606012202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (606012223) 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, 2999960 + ... + 3000161.

It is an arithmetic number, because the mean of its divisors is an integer number (153003111).

Almost surely, 2^606012221 is an apocalyptic number.

It is an amenable number.

606012221 is a deficient number, since it is larger than the sum of its proper divisors (6000223).

606012221 is a wasteful number, since it uses less digits than its factorization.

606012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000222.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 606012221 is about 24617.3154710257. The cubic root of 606012221 is about 846.2404763046.

Adding to 606012221 its reverse (122210606), we get a palindrome (728222827).

It can be divided in two parts, 6060 and 12221, that added together give a palindrome (18281).

The spelling of 606012221 in words is "six hundred six million, twelve thousand, two hundred twenty-one".