221655757112071 has 8 divisors (see below), whose sum is σ = 224777926416384. Its totient is φ = 218533594953240.

The previous prime is 221655757111967. The next prime is 221655757112087. The reversal of 221655757112071 is 170211757556122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221655757112071 - 2⁹ = 221655757111559 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 (221655757112371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107144130 + ... + 109193296.

It is an arithmetic number, because the mean of its divisors is an integer number (28097240802048).

Almost surely, 2^{221655757112071} is an apocalyptic number.

221655757112071 is a deficient number, since it is larger than the sum of its proper divisors (3122169304313).

221655757112071 is a wasteful number, since it uses less digits than its factorization.

221655757112071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572741.

The product of its (nonzero) digits is 2058000, while the sum is 52.

The spelling of 221655757112071 in words is "two hundred twenty-one trillion, six hundred fifty-five billion, seven hundred fifty-seven million, one hundred twelve thousand, seventy-one".