2201121 has 16 divisors (see below), whose sum is σ = 3512320. Its totient is φ = 1354320.

The previous prime is 2201119. The next prime is 2201137. The reversal of 2201121 is 1211022.

It is not a de Polignac number, because 2201121 - 2¹ = 2201119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2201161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2785 + ... + 3486.

It is an arithmetic number, because the mean of its divisors is an integer number (219520).

2^2201121 is an apocalyptic number.

It is an amenable number.

2201121 is a deficient number, since it is larger than the sum of its proper divisors (1311199).

2201121 is a wasteful number, since it uses less digits than its factorization.

2201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6293 (or 6287 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2201121 is about 1483.6175383164. The cubic root of 2201121 is about 130.0812312829.

Adding to 2201121 its reverse (1211022), we get a palindrome (3412143).

Subtracting from 2201121 its reverse (1211022), we obtain a palindrome (990099).

The spelling of 2201121 in words is "two million, two hundred one thousand, one hundred twenty-one".