1131411311 has 4 divisors (see below), whose sum is σ = 1131541992. Its totient is φ = 1131280632.

The previous prime is 1131411301. The next prime is 1131411409. The reversal of 1131411311 is 1131141311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131411311 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 1131411311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131411301) 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, 51356 + ... + 70001.

It is an arithmetic number, because the mean of its divisors is an integer number (282885498).

Almost surely, 2^1131411311 is an apocalyptic number.

1131411311 is a deficient number, since it is larger than the sum of its proper divisors (130681).

1131411311 is an equidigital number, since it uses as much as digits as its factorization.

1131411311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130680.

The product of its digits is 36, while the sum is 17.

The square root of 1131411311 is about 33636.4580626439. The cubic root of 1131411311 is about 1042.0138834337.

Adding to 1131411311 its reverse (1131141311), we get a palindrome (2262552622).

The spelling of 1131411311 in words is "one billion, one hundred thirty-one million, four hundred eleven thousand, three hundred eleven".