11101681 has 8 divisors (see below), whose sum is σ = 11717280. Its totient is φ = 10489248.

The previous prime is 11101679. The next prime is 11101703. The reversal of 11101681 is 18610111.

11101681 = T₂₇₁₉ + T₂₇₂₀ + T₂₇₂₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11101681 - 2¹ = 11101679 is a prime.

It is a super-2 number, since 2×11101681² = 246494642051522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11101661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11250 + ... + 12196.

It is an arithmetic number, because the mean of its divisors is an integer number (1464660).

Almost surely, 2^11101681 is an apocalyptic number.

11101681 is the 2721-st centered triangular number.

It is an amenable number.

11101681 is a deficient number, since it is larger than the sum of its proper divisors (615599).

11101681 is an equidigital number, since it uses as much as digits as its factorization.

11101681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583.

The product of its (nonzero) digits is 48, while the sum is 19.

The square root of 11101681 is about 3331.9185164106. The cubic root of 11101681 is about 223.0811705554.

Adding to 11101681 its reverse (18610111), we get a palindrome (29711792).

The spelling of 11101681 in words is "eleven million, one hundred one thousand, six hundred eighty-one".