2601224221 has 4 divisors (see below), whose sum is σ = 2604773692. Its totient is φ = 2597674752.

The previous prime is 2601224207. The next prime is 2601224251. The reversal of 2601224221 is 1224221062.

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 2226801721 + 374422500 = 47189^2 + 19350^2 .

It is a cyclic number.

It is not a de Polignac number, because 2601224221 - 2¹³ = 2601216029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2601224192 and 2601224201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2601224251) 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, 1773636 + ... + 1775101.

It is an arithmetic number, because the mean of its divisors is an integer number (651193423).

Almost surely, 2^2601224221 is an apocalyptic number.

It is an amenable number.

2601224221 is a deficient number, since it is larger than the sum of its proper divisors (3549471).

2601224221 is an equidigital number, since it uses as much as digits as its factorization.

2601224221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3549470.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 2601224221 is about 51002.1981977248. The cubic root of 2601224221 is about 1375.2846522078.

Adding to 2601224221 its reverse (1224221062), we get a palindrome (3825445283).

The spelling of 2601224221 in words is "two billion, six hundred one million, two hundred twenty-four thousand, two hundred twenty-one".