1131211413 has 24 divisors (see below), whose sum is σ = 1711303776. Its totient is φ = 746658000.

The previous prime is 1131211373. The next prime is 1131211441. The reversal of 1131211413 is 3141121311.

It is a happy number.

1131211413 is a `hidden beast` number, since 11 + 31 + 211 + 413 = 666.

It is not a de Polignac number, because 1131211413 - 2¹⁰ = 1131210389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131211453) 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, 1498 + ... + 47588.

It is an arithmetic number, because the mean of its divisors is an integer number (71304324).

Almost surely, 2^1131211413 is an apocalyptic number.

It is an amenable number.

1131211413 is a deficient number, since it is larger than the sum of its proper divisors (580092363).

1131211413 is an equidigital number, since it uses as much as digits as its factorization.

1131211413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46207 (or 46195 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1131211413 is about 33633.4864829681. The cubic root of 1131211413 is about 1041.9525120716.

Adding to 1131211413 its reverse (3141121311), we get a palindrome (4272332724).

The spelling of 1131211413 in words is "one billion, one hundred thirty-one million, two hundred eleven thousand, four hundred thirteen".