1111201211 has 4 divisors (see below), whose sum is σ = 1111432752. Its totient is φ = 1110969672.

The previous prime is 1111201181. The next prime is 1111201237. The reversal of 1111201211 is 1121021111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1111201211 - 2¹⁰ = 1111200187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111201192 and 1111201201.

It is not an unprimeable number, because it can be changed into a prime (1111201411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108416 + ... + 118221.

It is an arithmetic number, because the mean of its divisors is an integer number (277858188).

Almost surely, 2^1111201211 is an apocalyptic number.

1111201211 is a deficient number, since it is larger than the sum of its proper divisors (231541).

1111201211 is an equidigital number, since it uses as much as digits as its factorization.

1111201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231540.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1111201211 is about 33334.6848042696. The cubic root of 1111201211 is about 1035.7721640249.

Adding to 1111201211 its reverse (1121021111), we get a palindrome (2232222322).

The spelling of 1111201211 in words is "one billion, one hundred eleven million, two hundred one thousand, two hundred eleven".