221420458265671 has 16 divisors (see below), whose sum is σ = 260036629157376. Its totient is φ = 184556197439136.

The previous prime is 221420458265647. The next prime is 221420458265681. The reversal of 221420458265671 is 176562854024122.

221420458265671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221420458265671 - 2⁷ = 221420458265543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221420458265621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238738411 + ... + 239664076.

It is an arithmetic number, because the mean of its divisors is an integer number (16252289322336).

Almost surely, 2^{221420458265671} is an apocalyptic number.

221420458265671 is a deficient number, since it is larger than the sum of its proper divisors (38616170891705).

221420458265671 is a wasteful number, since it uses less digits than its factorization.

221420458265671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478404318.

The product of its (nonzero) digits is 12902400, while the sum is 55.

The spelling of 221420458265671 in words is "two hundred twenty-one trillion, four hundred twenty billion, four hundred fifty-eight million, two hundred sixty-five thousand, six hundred seventy-one".