220221318337 has 4 divisors (see below), whose sum is σ = 220497631956. Its totient is φ = 219945004720.

The previous prime is 220221318329. The next prime is 220221318341. The reversal of 220221318337 is 733813122022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143793398401 + 76427919936 = 379201^2 + 276456^2 .

It is a cyclic number.

It is not a de Polignac number, because 220221318337 - 2³ = 220221318329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220221318937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138155614 + ... + 138157207.

It is an arithmetic number, because the mean of its divisors is an integer number (55124407989).

Almost surely, 2^220221318337 is an apocalyptic number.

It is an amenable number.

220221318337 is a deficient number, since it is larger than the sum of its proper divisors (276313619).

220221318337 is an equidigital number, since it uses as much as digits as its factorization.

220221318337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276313618.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 220221318337 in words is "two hundred twenty billion, two hundred twenty-one million, three hundred eighteen thousand, three hundred thirty-seven".