1111211211 has 8 divisors (see below), whose sum is σ = 1616307264. Its totient is φ = 673461320.

The previous prime is 1111211209. The next prime is 1111211243. The reversal of 1111211211 is 1121121111.

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 1111211211 - 2¹ = 1111211209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1111211111) 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 7 ways as a sum of consecutive naturals, for example, 16836501 + ... + 16836566.

It is an arithmetic number, because the mean of its divisors is an integer number (202038408).

Almost surely, 2^1111211211 is an apocalyptic number.

1111211211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1111211211 is a deficient number, since it is larger than the sum of its proper divisors (505096053).

1111211211 is a wasteful number, since it uses less digits than its factorization.

1111211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33673081.

The product of its digits is 4, while the sum is 12.

The square root of 1111211211 is about 33334.8347978507. The cubic root of 1111211211 is about 1035.7752710802.

Adding to 1111211211 its reverse (1121121111), we get a palindrome (2232332322).

It can be divided in two parts, 11 and 11211211, that multiplied together give a palindrome (123323321).

The spelling of 1111211211 in words is "one billion, one hundred eleven million, two hundred eleven thousand, two hundred eleven".