1211099 has 8 divisors (see below), whose sum is σ = 1256640. Its totient is φ = 1166400.

The previous prime is 1211087. The next prime is 1211141. The reversal of 1211099 is 9901121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211099 - 2⁴ = 1211083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211039) 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 7 ways as a sum of consecutive naturals, for example, 4334 + ... + 4604.

It is an arithmetic number, because the mean of its divisors is an integer number (157080).

2^1211099 is an apocalyptic number.

1211099 is a deficient number, since it is larger than the sum of its proper divisors (45541).

1211099 is a wasteful number, since it uses less digits than its factorization.

1211099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1211099 is about 1100.4994320762. The cubic root of 1211099 is about 106.5924755357.

It can be divided in two parts, 12 and 11099, that added together give a palindrome (11111).

The spelling of 1211099 in words is "one million, two hundred eleven thousand, ninety-nine".