1111161111081 has 16 divisors (see below), whose sum is σ = 1727752944000. Its totient is φ = 634949205744.

The previous prime is 1111161111077. The next prime is 1111161111101. The reversal of 1111161111081 is 1801111611111.

It is not a de Polignac number, because 1111161111081 - 2² = 1111161111077 is a prime.

It is a super-3 number, since 3×1111161111081³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1111161111581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539921766 + ... + 539923823.

It is an arithmetic number, because the mean of its divisors is an integer number (107984559000).

Almost surely, 2^{1111161111081} is an apocalyptic number.

It is an amenable number.

1111161111081 is a deficient number, since it is larger than the sum of its proper divisors (616591832919).

1111161111081 is an equidigital number, since it uses as much as digits as its factorization.

1111161111081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079845613 (or 1079845599 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 24.

Adding to 1111161111081 its reverse (1801111611111), we get a palindrome (2912272722192).

The spelling of 1111161111081 in words is "one trillion, one hundred eleven billion, one hundred sixty-one million, one hundred eleven thousand, eighty-one".