201122221101221 has 32 divisors (see below), whose sum is σ = 247207041884160. Its totient is φ = 159772857422976.

The previous prime is 201122221101161. The next prime is 201122221101271. The reversal of 201122221101221 is 122101122221102.

It is not a de Polignac number, because 201122221101221 - 2¹⁰ = 201122221100197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201122221101193 and 201122221101202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201122221101271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7354976 + ... + 21362118.

It is an arithmetic number, because the mean of its divisors is an integer number (7725220058880).

Almost surely, 2^{201122221101221} is an apocalyptic number.

It is an amenable number.

201122221101221 is a deficient number, since it is larger than the sum of its proper divisors (46084820782939).

201122221101221 is a wasteful number, since it uses less digits than its factorization.

201122221101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14009513.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201122221101221 its reverse (122101122221102), we get a palindrome (323223343322323).

The spelling of 201122221101221 in words is "two hundred one trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred one thousand, two hundred twenty-one".