1131240511 has 2 divisors, whose sum is σ = 1131240512. Its totient is φ = 1131240510.

The previous prime is 1131240443. The next prime is 1131240521. The reversal of 1131240511 is 1150421311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131240511 - 2⁹ = 1131239999 is a prime.

It is a super-2 number, since 2×1131240511² = 2559410187455082242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131240521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565620255 + 565620256.

It is an arithmetic number, because the mean of its divisors is an integer number (565620256).

Almost surely, 2^1131240511 is an apocalyptic number.

1131240511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131240511 is an equidigital number, since it uses as much as digits as its factorization.

1131240511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1131240511 is about 33633.9190550254. The cubic root of 1131240511 is about 1041.9614459967.

Adding to 1131240511 its reverse (1150421311), we get a palindrome (2281661822).

The spelling of 1131240511 in words is "one billion, one hundred thirty-one million, two hundred forty thousand, five hundred eleven".