1115421331 has 2 divisors, whose sum is σ = 1115421332. Its totient is φ = 1115421330.

The previous prime is 1115421319. The next prime is 1115421341. The reversal of 1115421331 is 1331245111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1115421331 - 2¹⁵ = 1115388563 is a prime.

It is a super-2 number, since 2×1115421331² = 2488329491299623122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1115421341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557710665 + 557710666.

It is an arithmetic number, because the mean of its divisors is an integer number (557710666).

Almost surely, 2^1115421331 is an apocalyptic number.

1115421331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115421331 is an equidigital number, since it uses as much as digits as its factorization.

1115421331 is an evil number, because the sum of its binary digits is even.

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

The square root of 1115421331 is about 33397.9240522521. The cubic root of 1115421331 is about 1037.0817261240.

Adding to 1115421331 its reverse (1331245111), we get a palindrome (2446666442).

The spelling of 1115421331 in words is "one billion, one hundred fifteen million, four hundred twenty-one thousand, three hundred thirty-one".