1141133231 has 4 divisors (see below), whose sum is σ = 1304152272. Its totient is φ = 978114192.

The previous prime is 1141133221. The next prime is 1141133261. The reversal of 1141133231 is 1323311411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1323311411 = 19 ⋅69647969.

It is a cyclic number.

It is not a de Polignac number, because 1141133231 - 2⁶ = 1141133167 is a prime.

It is a super-2 number, since 2×1141133231² = 2604370101784998722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1141133221) 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, 81509510 + ... + 81509523.

It is an arithmetic number, because the mean of its divisors is an integer number (326038068).

Almost surely, 2^1141133231 is an apocalyptic number.

1141133231 is a deficient number, since it is larger than the sum of its proper divisors (163019041).

1141133231 is an equidigital number, since it uses as much as digits as its factorization.

1141133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163019040.

The product of its digits is 216, while the sum is 20.

The square root of 1141133231 is about 33780.6635666027. The cubic root of 1141133231 is about 1044.9899592299.

Adding to 1141133231 its reverse (1323311411), we get a palindrome (2464444642).

The spelling of 1141133231 in words is "one billion, one hundred forty-one million, one hundred thirty-three thousand, two hundred thirty-one".