1151151109 has 4 divisors (see below), whose sum is σ = 1151279116. Its totient is φ = 1151023104.

The previous prime is 1151151061. The next prime is 1151151181. The reversal of 1151151109 is 9011511511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9011511511 = 4751 ⋅1896761.

It can be written as a sum of positive squares in 2 ways, for example, as 735602884 + 415548225 = 27122^2 + 20385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151151109 - 2¹¹ = 1151149061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151157109) 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, 49404 + ... + 68869.

It is an arithmetic number, because the mean of its divisors is an integer number (287819779).

Almost surely, 2^1151151109 is an apocalyptic number.

It is an amenable number.

1151151109 is a deficient number, since it is larger than the sum of its proper divisors (128007).

1151151109 is an equidigital number, since it uses as much as digits as its factorization.

1151151109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128006.

The product of its (nonzero) digits is 225, while the sum is 25.

The square root of 1151151109 is about 33928.6178468855. The cubic root of 1151151109 is about 1048.0390032320.

The spelling of 1151151109 in words is "one billion, one hundred fifty-one million, one hundred fifty-one thousand, one hundred nine".