221220220010201 has 4 divisors (see below), whose sum is σ = 226364876289552. Its totient is φ = 216075563730852.

The previous prime is 221220220010173. The next prime is 221220220010243. The reversal of 221220220010201 is 102010022022122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221220220010201 - 2²⁶ = 221220152901337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221220220010201.

It is not an unprimeable number, because it can be changed into a prime (221220220010281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2572328139611 + ... + 2572328139696.

It is an arithmetic number, because the mean of its divisors is an integer number (56591219072388).

Almost surely, 2^{221220220010201} is an apocalyptic number.

It is an amenable number.

221220220010201 is a deficient number, since it is larger than the sum of its proper divisors (5144656279351).

221220220010201 is an equidigital number, since it uses as much as digits as its factorization.

221220220010201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5144656279350.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221220220010201 its reverse (102010022022122), we get a palindrome (323230242032323).

The spelling of 221220220010201 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred twenty million, ten thousand, two hundred one".