1161147111 has 16 divisors (see below), whose sum is σ = 1616858880. Its totient is φ = 739823040.

The previous prime is 1161147083. The next prime is 1161147121. The reversal of 1161147111 is 1117411611.

It is not a de Polignac number, because 1161147111 - 2⁶ = 1161147047 is a prime.

It is a super-2 number, since 2×1161147111² = 2696525226767292642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161147121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84780 + ... + 97518.

It is an arithmetic number, because the mean of its divisors is an integer number (101053680).

Almost surely, 2^1161147111 is an apocalyptic number.

1161147111 is a deficient number, since it is larger than the sum of its proper divisors (455711769).

1161147111 is a wasteful number, since it uses less digits than its factorization.

1161147111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14086.

The product of its digits is 168, while the sum is 24.

The square root of 1161147111 is about 34075.6087399770. The cubic root of 1161147111 is about 1051.0638080062.

Adding to 1161147111 its reverse (1117411611), we get a palindrome (2278558722).

The spelling of 1161147111 in words is "one billion, one hundred sixty-one million, one hundred forty-seven thousand, one hundred eleven".