1121131211 has 4 divisors (see below), whose sum is σ = 1121198400. Its totient is φ = 1121064024.

The previous prime is 1121131201. The next prime is 1121131223. The reversal of 1121131211 is 1121311211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1121131211 - 2¹⁰ = 1121130187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121131201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12710 + ... + 49028.

It is an arithmetic number, because the mean of its divisors is an integer number (280299600).

Almost surely, 2^1121131211 is an apocalyptic number.

1121131211 is a deficient number, since it is larger than the sum of its proper divisors (67189).

1121131211 is an equidigital number, since it uses as much as digits as its factorization.

1121131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67188.

The product of its digits is 12, while the sum is 14.

The square root of 1121131211 is about 33483.2974929292. The cubic root of 1121131211 is about 1038.8483340619.

Adding to 1121131211 its reverse (1121311211), we get a palindrome (2242442422).

The spelling of 1121131211 in words is "one billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred eleven".