1131212313 has 24 divisors (see below), whose sum is σ = 2037162816. Its totient is φ = 587642400.

The previous prime is 1131212311. The next prime is 1131212333. The reversal of 1131212313 is 3132121311.

1131212313 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1131212313 - 2¹ = 1131212311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131212311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 815478 + ... + 816863.

It is an arithmetic number, because the mean of its divisors is an integer number (84881784).

Almost surely, 2^1131212313 is an apocalyptic number.

It is an amenable number.

1131212313 is a deficient number, since it is larger than the sum of its proper divisors (905950503).

1131212313 is a wasteful number, since it uses less digits than its factorization.

1131212313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632365 (or 1632362 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1131212313 is about 33633.4998624883. The cubic root of 1131212313 is about 1041.9527883998.

Adding to 1131212313 its reverse (3132121311), we get a palindrome (4263333624).

It can be divided in two parts, 1131 and 212313, that added together give a square (213444 = 462²).

The spelling of 1131212313 in words is "one billion, one hundred thirty-one million, two hundred twelve thousand, three hundred thirteen".