11199121 has 2 divisors, whose sum is σ = 11199122. Its totient is φ = 11199120.

The previous prime is 11199103. The next prime is 11199143. The reversal of 11199121 is 12199111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11128896 + 70225 = 3336^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 11199121 - 2¹³ = 11190929 is a prime.

It is a super-2 number, since 2×11199121² = 250840622345282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11199101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5599560 + 5599561.

It is an arithmetic number, because the mean of its divisors is an integer number (5599561).

Almost surely, 2^11199121 is an apocalyptic number.

It is an amenable number.

11199121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11199121 is an equidigital number, since it uses as much as digits as its factorization.

11199121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162, while the sum is 25.

The square root of 11199121 is about 3346.5087778161. The cubic root of 11199121 is about 223.7319351228.

The spelling of 11199121 in words is "eleven million, one hundred ninety-nine thousand, one hundred twenty-one".