220706027721 has 32 divisors (see below), whose sum is σ = 346371984000. Its totient is φ = 138415633920.

The previous prime is 220706027693. The next prime is 220706027743. The reversal of 220706027721 is 127720607022.

220706027721 is a `hidden beast` number, since 2 + 20 + 7 + 0 + 602 + 7 + 7 + 21 = 666.

220706027721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220706027721 - 2²¹ = 220703930569 is a prime.

It is a super-2 number, since 2×220706027721² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220706027761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 848901 + ... + 1077981.

It is an arithmetic number, because the mean of its divisors is an integer number (10824124500).

Almost surely, 2^220706027721 is an apocalyptic number.

It is an amenable number.

220706027721 is a deficient number, since it is larger than the sum of its proper divisors (125665956279).

220706027721 is a wasteful number, since it uses less digits than its factorization.

220706027721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231206 (or 231200 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The spelling of 220706027721 in words is "two hundred twenty billion, seven hundred six million, twenty-seven thousand, seven hundred twenty-one".