221221110100201 has 8 divisors (see below), whose sum is σ = 223502072078880. Its totient is φ = 218940154896768.

The previous prime is 221221110100079. The next prime is 221221110100301. The reversal of 221221110100201 is 102001011122122.

221221110100201 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 a cyclic number.

It is not a de Polignac number, because 221221110100201 - 2⁷ = 221221110100073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221110100301) 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, 88671090 + ... + 91131796.

It is an arithmetic number, because the mean of its divisors is an integer number (27937759009860).

Almost surely, 2^{221221110100201} is an apocalyptic number.

It is an amenable number.

221221110100201 is a deficient number, since it is larger than the sum of its proper divisors (2280961978679).

221221110100201 is an equidigital number, since it uses as much as digits as its factorization.

221221110100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387623.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221221110100201 its reverse (102001011122122), we get a palindrome (323222121222323).

The spelling of 221221110100201 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred ten million, one hundred thousand, two hundred one".