201220112221 has 8 divisors (see below), whose sum is σ = 203029130304. Its totient is φ = 199415230560.

The previous prime is 201220112209. The next prime is 201220112227. The reversal of 201220112221 is 122211022102.

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 201220112221 - 2¹⁵ = 201220079453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201220112195 and 201220112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220112227) 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, 936336 + ... + 1131001.

It is an arithmetic number, because the mean of its divisors is an integer number (25378641288).

Almost surely, 2^201220112221 is an apocalyptic number.

It is an amenable number.

201220112221 is a deficient number, since it is larger than the sum of its proper divisors (1809018083).

201220112221 is a wasteful number, since it uses less digits than its factorization.

201220112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068211.

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

Adding to 201220112221 its reverse (122211022102), we get a palindrome (323431134323).

The spelling of 201220112221 in words is "two hundred one billion, two hundred twenty million, one hundred twelve thousand, two hundred twenty-one".