201222101221 has 8 divisors (see below), whose sum is σ = 201481023744. Its totient is φ = 200963247600.

The previous prime is 201222101191. The next prime is 201222101237. The reversal of 201222101221 is 122101222102.

It is a happy number.

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 201222101221 - 2⁵ = 201222101189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201222101195 and 201222101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201222101291) 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, 8364216 + ... + 8388238.

It is an arithmetic number, because the mean of its divisors is an integer number (25185127968).

Almost surely, 2^201222101221 is an apocalyptic number.

It is an amenable number.

201222101221 is a deficient number, since it is larger than the sum of its proper divisors (258922523).

201222101221 is an equidigital number, since it uses as much as digits as its factorization.

201222101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34451.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201222101221 its reverse (122101222102), we get a palindrome (323323323323).

The spelling of 201222101221 in words is "two hundred one billion, two hundred twenty-two million, one hundred one thousand, two hundred twenty-one".