4221605013601 has 4 divisors (see below), whose sum is σ = 4221644978692. Its totient is φ = 4221565048512.

The previous prime is 4221605013547. The next prime is 4221605013607. The reversal of 4221605013601 is 1063105061224.

It is a happy number.

4221605013601 is digitally balanced in base 2, 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 3653354390625 + 568250622976 = 1911375^2 + 753824^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221605013601 - 2¹⁵ = 4221604980833 is a prime.

It is a super-4 number, since 4×4221605013601⁴ (a number of 52 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4221605013607) 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, 19823676 + ... + 20035501.

It is an arithmetic number, because the mean of its divisors is an integer number (1055411244673).

Almost surely, 2^{4221605013601} is an apocalyptic number.

It is an amenable number.

4221605013601 is a deficient number, since it is larger than the sum of its proper divisors (39965091).

4221605013601 is a wasteful number, since it uses less digits than its factorization.

4221605013601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39965090.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 4221605013601 in words is "four trillion, two hundred twenty-one billion, six hundred five million, thirteen thousand, six hundred one".