221770240601321 has 8 divisors (see below), whose sum is σ = 222186356071944. Its totient is φ = 221354147969280.

The previous prime is 221770240601297. The next prime is 221770240601341. The reversal of 221770240601321 is 123106042077122.

It can be written as a sum of positive squares in 4 ways, for example, as 72572321685721 + 149197918915600 = 8518939^2 + 12214660^2 .

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 221770240601321 - 2²⁶ = 221770173492457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221770240601341) 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, 13791665 + ... + 25174401.

It is an arithmetic number, because the mean of its divisors is an integer number (27773294508993).

Almost surely, 2^{221770240601321} is an apocalyptic number.

It is an amenable number.

221770240601321 is a deficient number, since it is larger than the sum of its proper divisors (416115470623).

221770240601321 is a wasteful number, since it uses less digits than its factorization.

221770240601321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11419291.

The product of its (nonzero) digits is 56448, while the sum is 38.

Adding to 221770240601321 its reverse (123106042077122), we get a palindrome (344876282678443).

The spelling of 221770240601321 in words is "two hundred twenty-one trillion, seven hundred seventy billion, two hundred forty million, six hundred one thousand, three hundred twenty-one".