2227121 has 4 divisors (see below), whose sum is σ = 2398452. Its totient is φ = 2055792.

The previous prime is 2227109. The next prime is 2227129. The reversal of 2227121 is 1217222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1217222 = 2 ⋅608611.

It can be written as a sum of positive squares in 2 ways, for example, as 442225 + 1784896 = 665^2 + 1336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2227121 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2227121.

It is not an unprimeable number, because it can be changed into a prime (2227129) 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 3 ways as a sum of consecutive naturals, for example, 85646 + ... + 85671.

It is an arithmetic number, because the mean of its divisors is an integer number (599613).

2^2227121 is an apocalyptic number.

It is an amenable number.

2227121 is a deficient number, since it is larger than the sum of its proper divisors (171331).

2227121 is a wasteful number, since it uses less digits than its factorization.

2227121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171330.

The product of its digits is 112, while the sum is 17.

The square root of 2227121 is about 1492.3541804813. The cubic root of 2227121 is about 130.5914079963.

The spelling of 2227121 in words is "two million, two hundred twenty-seven thousand, one hundred twenty-one".