2199121 has 2 divisors, whose sum is σ = 2199122. Its totient is φ = 2199120.

The previous prime is 2199077. The next prime is 2199133. The reversal of 2199121 is 1219912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1960000 + 239121 = 1400^2 + 489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2199121 is a prime.

It is a super-2 number, since 2×2199121² = 9672266345282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2199151) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099560 + 1099561.

It is an arithmetic number, because the mean of its divisors is an integer number (1099561).

2^2199121 is an apocalyptic number.

It is an amenable number.

2199121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2199121 is an equidigital number, since it uses as much as digits as its factorization.

2199121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 25.

The square root of 2199121 is about 1482.9433569763. The cubic root of 2199121 is about 130.0418208644.

The spelling of 2199121 in words is "two million, one hundred ninety-nine thousand, one hundred twenty-one".