11001011985 has 12 divisors (see below), whose sum is σ = 19068420852. Its totient is φ = 5867206368.

The previous prime is 11001011977. The next prime is 11001011993. The reversal of 11001011985 is 58911010011.

It is an interprime number because it is at equal distance from previous prime (11001011977) and next prime (11001011993).

It can be written as a sum of positive squares in 2 ways, for example, as 2924754561 + 8076257424 = 54081^2 + 89868^2 .

It is not a de Polignac number, because 11001011985 - 2³ = 11001011977 is a prime.

It is a super-2 number, since 2×11001011985² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122233422 + ... + 122233511.

It is an arithmetic number, because the mean of its divisors is an integer number (1589035071).

Almost surely, 2^11001011985 is an apocalyptic number.

11001011985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11001011985 is a deficient number, since it is larger than the sum of its proper divisors (8067408867).

11001011985 is a wasteful number, since it uses less digits than its factorization.

11001011985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244466944 (or 244466941 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 27.

Adding to 11001011985 its reverse (58911010011), we get a palindrome (69912021996).

The spelling of 11001011985 in words is "eleven billion, one million, eleven thousand, nine hundred eighty-five".