11097120181 has 4 divisors (see below), whose sum is σ = 12682423072. Its totient is φ = 9511817292.

The previous prime is 11097120161. The next prime is 11097120187. The reversal of 11097120181 is 18102179011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18102179011 = 7 ⋅2586025573.

It is a cyclic number.

It is not a de Polignac number, because 11097120181 - 2⁷ = 11097120053 is a prime.

It is a super-2 number, since 2×11097120181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11097120187) 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, 792651435 + ... + 792651448.

It is an arithmetic number, because the mean of its divisors is an integer number (3170605768).

Almost surely, 2^11097120181 is an apocalyptic number.

It is an amenable number.

11097120181 is a deficient number, since it is larger than the sum of its proper divisors (1585302891).

11097120181 is an equidigital number, since it uses as much as digits as its factorization.

11097120181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585302890.

The product of its (nonzero) digits is 1008, while the sum is 31.

Adding to 11097120181 its reverse (18102179011), we get a palindrome (29199299192).

The spelling of 11097120181 in words is "eleven billion, ninety-seven million, one hundred twenty thousand, one hundred eighty-one".