2206121 has 2 divisors, whose sum is σ = 2206122. Its totient is φ = 2206120.

The previous prime is 2206103. The next prime is 2206123. The reversal of 2206121 is 1216022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1466521 + 739600 = 1211^2 + 860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2206121 is a prime.

Together with 2206123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2206096 and 2206105.

It is not a weakly prime, because it can be changed into another prime (2206123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1103060 + 1103061.

It is an arithmetic number, because the mean of its divisors is an integer number (1103061).

2^2206121 is an apocalyptic number.

It is an amenable number.

2206121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2206121 is an equidigital number, since it uses as much as digits as its factorization.

2206121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2206121 is about 1485.3016528638. The cubic root of 2206121 is about 130.1796529955.

Subtracting from 2206121 its reverse (1216022), we obtain a palindrome (990099).

The spelling of 2206121 in words is "two million, two hundred six thousand, one hundred twenty-one".