1131211313 has 4 divisors (see below), whose sum is σ = 1131280368. Its totient is φ = 1131142260.

The previous prime is 1131211309. The next prime is 1131211337. The reversal of 1131211313 is 3131121311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, 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 1131211313 - 2² = 1131211309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1131211291 and 1131211300.

It is not an unprimeable number, because it can be changed into a prime (1131211373) 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, 5558 + ... + 47888.

It is an arithmetic number, because the mean of its divisors is an integer number (282820092).

Almost surely, 2^1131211313 is an apocalyptic number.

It is an amenable number.

1131211313 is a deficient number, since it is larger than the sum of its proper divisors (69055).

1131211313 is an equidigital number, since it uses as much as digits as its factorization.

1131211313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69054.

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

The square root of 1131211313 is about 33633.4849963545. The cubic root of 1131211313 is about 1041.9524813684.

Adding to 1131211313 its reverse (3131121311), we get a palindrome (4262332624).

The spelling of 1131211313 in words is "one billion, one hundred thirty-one million, two hundred eleven thousand, three hundred thirteen".