4221445609261 has 4 divisors (see below), whose sum is σ = 4221713262492. Its totient is φ = 4221177956032.

The previous prime is 4221445609253. The next prime is 4221445609351. The reversal of 4221445609261 is 1629065441224.

4221445609261 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 2249682011236 + 1971763598025 = 1499894^2 + 1404195^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221445609261 - 2³ = 4221445609253 is a prime.

It is a super-2 number, since 2×4221445609261² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221445609361) 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, 133802956 + ... + 133834501.

It is an arithmetic number, because the mean of its divisors is an integer number (1055428315623).

Almost surely, 2^{4221445609261} is an apocalyptic number.

It is an amenable number.

4221445609261 is a deficient number, since it is larger than the sum of its proper divisors (267653231).

4221445609261 is a wasteful number, since it uses less digits than its factorization.

4221445609261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267653230.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 4221445609261 in words is "four trillion, two hundred twenty-one billion, four hundred forty-five million, six hundred nine thousand, two hundred sixty-one".