1161233011 has 2 divisors, whose sum is σ = 1161233012. Its totient is φ = 1161233010.

The previous prime is 1161232987. The next prime is 1161233023. The reversal of 1161233011 is 1103321611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1161233011 - 2⁵ = 1161232979 is a prime.

It is a super-2 number, since 2×1161233011² = 2696924211672252242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1161233011.

It is not a weakly prime, because it can be changed into another prime (1161233041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580616505 + 580616506.

It is an arithmetic number, because the mean of its divisors is an integer number (580616506).

Almost surely, 2^1161233011 is an apocalyptic number.

1161233011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161233011 is an equidigital number, since it uses as much as digits as its factorization.

1161233011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1161233011 is about 34076.8691490283. The cubic root of 1161233011 is about 1051.0897260987.

Adding to 1161233011 its reverse (1103321611), we get a palindrome (2264554622).

The spelling of 1161233011 in words is "one billion, one hundred sixty-one million, two hundred thirty-three thousand, eleven".