1100085881 has 2 divisors, whose sum is σ = 1100085882. Its totient is φ = 1100085880.

The previous prime is 1100085853. The next prime is 1100085941. The reversal of 1100085881 is 1885800011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972192400 + 127893481 = 31180^2 + 11309^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100085881 - 2²⁶ = 1032977017 is a prime.

It is a super-2 number, since 2×1100085881² = 2420377891151092322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1100985881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550042940 + 550042941.

It is an arithmetic number, because the mean of its divisors is an integer number (550042941).

Almost surely, 2^1100085881 is an apocalyptic number.

It is an amenable number.

1100085881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100085881 is an equidigital number, since it uses as much as digits as its factorization.

1100085881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 32.

The square root of 1100085881 is about 33167.5425830736. The cubic root of 1100085881 is about 1032.3069793780.

Adding to 1100085881 its reverse (1885800011), we get a palindrome (2985885892).

The spelling of 1100085881 in words is "one billion, one hundred million, eighty-five thousand, eight hundred eighty-one".