1131121413 has 12 divisors (see below), whose sum is σ = 1678000428. Its totient is φ = 733700160.

The previous prime is 1131121379. The next prime is 1131121417. The reversal of 1131121413 is 3141211311.

It is a happy number.

1131121413 is a `hidden beast` number, since 1 + 131 + 121 + 413 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 509766084 + 621355329 = 22578^2 + 24927^2 .

It is not a de Polignac number, because 1131121413 - 2¹⁸ = 1130859269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131121417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1698048 + ... + 1698713.

It is an arithmetic number, because the mean of its divisors is an integer number (139833369).

Almost surely, 2^1131121413 is an apocalyptic number.

It is an amenable number.

1131121413 is a deficient number, since it is larger than the sum of its proper divisors (546879015).

1131121413 is a wasteful number, since it uses less digits than its factorization.

1131121413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396804 (or 3396801 counting only the distinct ones).

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

The square root of 1131121413 is about 33632.1485040727. The cubic root of 1131121413 is about 1041.9248785063.

Adding to 1131121413 its reverse (3141211311), we get a palindrome (4272332724).

The spelling of 1131121413 in words is "one billion, one hundred thirty-one million, one hundred twenty-one thousand, four hundred thirteen".