2222121 has 24 divisors (see below), whose sum is σ = 3448224. Its totient is φ = 1262080.

The previous prime is 2222093. The next prime is 2222123. The reversal of 2222121 is 1212222.

It is not a de Polignac number, because 2222121 - 2⁵ = 2222089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2222097 and 2222106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9421 + ... + 9653.

It is an arithmetic number, because the mean of its divisors is an integer number (143676).

2^2222121 is an apocalyptic number.

It is an amenable number.

2222121 is a deficient number, since it is larger than the sum of its proper divisors (1226103).

2222121 is a wasteful number, since it uses less digits than its factorization.

2222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 264 counting only the distinct ones).

The product of its digits is 32, while the sum is 12.

The square root of 2222121 is about 1490.6780336478. The cubic root of 2222121 is about 130.4936066509.

Adding to 2222121 its reverse (1212222), we get a palindrome (3434343).

It can be divided in two parts, 2222 and 121, that multiplied together give a palindrome (268862).

The spelling of 2222121 in words is "two million, two hundred twenty-two thousand, one hundred twenty-one".