220771025721 has 12 divisors (see below), whose sum is σ = 329178304000. Its totient is φ = 142432919640.

The previous prime is 220771025707. The next prime is 220771025801. The reversal of 220771025721 is 127520177022.

It is a happy number.

220771025721 is a `hidden beast` number, since 2 + 2 + 0 + 77 + 10 + 2 + 572 + 1 = 666.

It is not a de Polignac number, because 220771025721 - 2¹¹ = 220771023673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220771025821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395646721 + ... + 395647278.

Almost surely, 2^220771025721 is an apocalyptic number.

It is an amenable number.

220771025721 is a deficient number, since it is larger than the sum of its proper divisors (108407278279).

220771025721 is a wasteful number, since it uses less digits than its factorization.

220771025721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791294036 (or 791294033 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 36.

The spelling of 220771025721 in words is "two hundred twenty billion, seven hundred seventy-one million, twenty-five thousand, seven hundred twenty-one".