221012220222201 has 4 divisors (see below), whose sum is σ = 294682960296272. Its totient is φ = 147341480148132.

The previous prime is 221012220222179. The next prime is 221012220222203. The reversal of 221012220222201 is 102222022210122.

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 not a de Polignac number, because 221012220222201 - 2⁵ = 221012220222169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221012220222203) 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, 36835370037031 + ... + 36835370037036.

It is an arithmetic number, because the mean of its divisors is an integer number (73670740074068).

Almost surely, 2^{221012220222201} is an apocalyptic number.

It is an amenable number.

221012220222201 is a deficient number, since it is larger than the sum of its proper divisors (73670740074071).

221012220222201 is an equidigital number, since it uses as much as digits as its factorization.

221012220222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73670740074070.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221012220222201 its reverse (102222022210122), we get a palindrome (323234242432323).

The spelling of 221012220222201 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty million, two hundred twenty-two thousand, two hundred one".