1135431121 has 4 divisors (see below), whose sum is σ = 1238652144. Its totient is φ = 1032210100.

The previous prime is 1135431097. The next prime is 1135431131. The reversal of 1135431121 is 1211345311.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1135431121 - 2⁷ = 1135430993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1135431092 and 1135431101.

It is not an unprimeable number, because it can be changed into a prime (1135431131) 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, 51610495 + ... + 51610516.

It is an arithmetic number, because the mean of its divisors is an integer number (309663036).

Almost surely, 2^1135431121 is an apocalyptic number.

1135431121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1135431121 is a deficient number, since it is larger than the sum of its proper divisors (103221023).

1135431121 is a wasteful number, since it uses less digits than its factorization.

1135431121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103221022.

The product of its digits is 360, while the sum is 22.

The square root of 1135431121 is about 33696.1588463730. The cubic root of 1135431121 is about 1043.2464876035.

Adding to 1135431121 its reverse (1211345311), we get a palindrome (2346776432).

The spelling of 1135431121 in words is "one billion, one hundred thirty-five million, four hundred thirty-one thousand, one hundred twenty-one".