1121331311 has 8 divisors (see below), whose sum is σ = 1153937664. Its totient is φ = 1089089560.

The previous prime is 1121331269. The next prime is 1121331317. The reversal of 1121331311 is 1131331211.

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 1121331311 - 2¹⁴ = 1121314927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121331311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121331317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84905 + ... + 97218.

It is an arithmetic number, because the mean of its divisors is an integer number (144242208).

Almost surely, 2^1121331311 is an apocalyptic number.

1121331311 is a deficient number, since it is larger than the sum of its proper divisors (32606353).

1121331311 is a wasteful number, since it uses less digits than its factorization.

1121331311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182301.

The product of its digits is 54, while the sum is 17.

The square root of 1121331311 is about 33486.2854165702. The cubic root of 1121331311 is about 1038.9101350904.

Adding to 1121331311 its reverse (1131331211), we get a palindrome (2252662522).

It can be divided in two parts, 11213 and 31311, that added together give a palindrome (42524).

The spelling of 1121331311 in words is "one billion, one hundred twenty-one million, three hundred thirty-one thousand, three hundred eleven".