11111113888901 has 6 divisors (see below), whose sum is σ = 12031561193490. Its totient is φ = 10256412820368.

The previous prime is 11111113888817. The next prime is 11111113888909. The reversal of 11111113888901 is 10988831111111.

It can be written as a sum of positive squares in 3 ways, for example, as 572481390625 + 10538632498276 = 756625^2 + 3246326^2 .

It is not a de Polignac number, because 11111113888901 - 2³⁸ = 10836235981957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111113888909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32873117846 + ... + 32873118183.

It is an arithmetic number, because the mean of its divisors is an integer number (2005260198915).

Almost surely, 2^{11111113888901} is an apocalyptic number.

It is an amenable number.

11111113888901 is a deficient number, since it is larger than the sum of its proper divisors (920447304589).

11111113888901 is an equidigital number, since it uses as much as digits as its factorization.

11111113888901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65746236055 (or 65746236042 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 44.

The spelling of 11111113888901 in words is "eleven trillion, one hundred eleven billion, one hundred thirteen million, eight hundred eighty-eight thousand, nine hundred one".