1085112181 has 4 divisors (see below), whose sum is σ = 1110347392. Its totient is φ = 1059876972.

The previous prime is 1085112179. The next prime is 1085112187. The reversal of 1085112181 is 1812115801.

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: 1812115801 = 1867 ⋅970603.

It is a cyclic number.

It is not a de Polignac number, because 1085112181 - 2¹ = 1085112179 is a prime.

It is a super-2 number, since 2×1085112181² = 2354936890709153522, which 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 (1085112187) 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, 12617541 + ... + 12617626.

It is an arithmetic number, because the mean of its divisors is an integer number (277586848).

Almost surely, 2^1085112181 is an apocalyptic number.

It is an amenable number.

1085112181 is a deficient number, since it is larger than the sum of its proper divisors (25235211).

1085112181 is an equidigital number, since it uses as much as digits as its factorization.

1085112181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25235210.

The product of its (nonzero) digits is 640, while the sum is 28.

The square root of 1085112181 is about 32941.0409823369. The cubic root of 1085112181 is about 1027.6018549956.

Adding to 1085112181 its reverse (1812115801), we get a palindrome (2897227982).

It can be divided in two parts, 10851 and 12181, that added together give a palindrome (23032).

The spelling of 1085112181 in words is "one billion, eighty-five million, one hundred twelve thousand, one hundred eighty-one".