1121131311 has 4 divisors (see below), whose sum is σ = 1494841752. Its totient is φ = 747420872.

The previous prime is 1121131273. The next prime is 1121131321. The reversal of 1121131311 is 1131311211.

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 1121131311 - 2⁶ = 1121131247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121131321) 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, 186855216 + ... + 186855221.

It is an arithmetic number, because the mean of its divisors is an integer number (373710438).

Almost surely, 2^1121131311 is an apocalyptic number.

1121131311 is a deficient number, since it is larger than the sum of its proper divisors (373710441).

1121131311 is an equidigital number, since it uses as much as digits as its factorization.

1121131311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373710440.

The product of its digits is 18, while the sum is 15.

The square root of 1121131311 is about 33483.2989862110. The cubic root of 1121131311 is about 1038.8483649488.

Adding to 1121131311 its reverse (1131311211), we get a palindrome (2252442522).

The spelling of 1121131311 in words is "one billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred eleven".