2201222121 has 8 divisors (see below), whose sum is σ = 3354243264. Its totient is φ = 1257841200.

The previous prime is 2201222113. The next prime is 2201222123. The reversal of 2201222121 is 1212221022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2201222121 - 2³ = 2201222113 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2201222121.

It is not an unprimeable number, because it can be changed into a prime (2201222123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52410030 + ... + 52410071.

It is an arithmetic number, because the mean of its divisors is an integer number (419280408).

Almost surely, 2^2201222121 is an apocalyptic number.

2201222121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2201222121 is a deficient number, since it is larger than the sum of its proper divisors (1153021143).

2201222121 is a wasteful number, since it uses less digits than its factorization.

2201222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104820111.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2201222121 is about 46917.1836430961. The cubic root of 2201222121 is about 1300.8322325918.

Adding to 2201222121 its reverse (1212221022), we get a palindrome (3413443143).

The spelling of 2201222121 in words is "two billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty-one".