221220221007165 has 8 divisors (see below), whose sum is σ = 353952353611488. Its totient is φ = 117984117870480.

The previous prime is 221220221007143. The next prime is 221220221007169. The reversal of 221220221007165 is 561700122022122.

221220221007165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221220221007165 - 2¹⁴ = 221220220990781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220221007169) 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, 7374007366891 + ... + 7374007366920.

It is an arithmetic number, because the mean of its divisors is an integer number (44244044201436).

Almost surely, 2^{221220221007165} is an apocalyptic number.

It is an amenable number.

221220221007165 is a deficient number, since it is larger than the sum of its proper divisors (132732132604323).

221220221007165 is a wasteful number, since it uses less digits than its factorization.

221220221007165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14748014733819.

The product of its (nonzero) digits is 13440, while the sum is 33.

Adding to 221220221007165 its reverse (561700122022122), we get a palindrome (782920343029287).

The spelling of 221220221007165 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred twenty-one million, seven thousand, one hundred sixty-five".