2201121121 has 8 divisors (see below), whose sum is σ = 2387443464. Its totient is φ = 2021114880.

The previous prime is 2201121113. The next prime is 2201121173. The reversal of 2201121121 is 1211211022.

It can be written as a sum of positive squares in 4 ways, for example, as 190854225 + 2010266896 = 13815^2 + 44836^2 .

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 2201121121 - 2³ = 2201121113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2201121521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1578300 + ... + 1579693.

It is an arithmetic number, because the mean of its divisors is an integer number (298430433).

Almost surely, 2^2201121121 is an apocalyptic number.

It is an amenable number.

2201121121 is a deficient number, since it is larger than the sum of its proper divisors (186322343).

2201121121 is a wasteful number, since it uses less digits than its factorization.

2201121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158051.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2201121121 is about 46916.1072660552. The cubic root of 2201121121 is about 1300.8123366646.

Adding to 2201121121 its reverse (1211211022), we get a palindrome (3412332143).

The spelling of 2201121121 in words is "two billion, two hundred one million, one hundred twenty-one thousand, one hundred twenty-one".