220863254771221 has 8 divisors (see below), whose sum is σ = 233858928242520. Its totient is φ = 207867994334208.

The previous prime is 220863254771183. The next prime is 220863254771227. The reversal of 220863254771221 is 122177452368022.

It can be written as a sum of positive squares in 4 ways, for example, as 103693692660100 + 117169562111121 = 10183010^2 + 10824489^2 .

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 220863254771221 - 2¹¹ = 220863254769173 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 (220863254771227) 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, 102157306 + ... + 104296891.

It is an arithmetic number, because the mean of its divisors is an integer number (29232366030315).

Almost surely, 2^{220863254771221} is an apocalyptic number.

It is an amenable number.

220863254771221 is a deficient number, since it is larger than the sum of its proper divisors (12995673471299).

220863254771221 is a wasteful number, since it uses less digits than its factorization.

220863254771221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206517143.

The product of its (nonzero) digits is 4515840, while the sum is 52.

The spelling of 220863254771221 in words is "two hundred twenty trillion, eight hundred sixty-three billion, two hundred fifty-four million, seven hundred seventy-one thousand, two hundred twenty-one".