11111110100001 has 12 divisors (see below), whose sum is σ = 16483148317012. Its totient is φ = 7207206551136.

The previous prime is 11111110099979. The next prime is 11111110100003. The reversal of 11111110100001 is 10000101111111.

It can be written as a sum of positive squares in 2 ways, for example, as 4936128627600 + 6174981472401 = 2221740^2 + 2484951^2 .

It is not a de Polignac number, because 11111110100001 - 2⁹ = 11111110099489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111110100003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16683348166 + ... + 16683348831.

Almost surely, 2^{11111110100001} is an apocalyptic number.

It is an amenable number.

11111110100001 is a deficient number, since it is larger than the sum of its proper divisors (5372038217011).

11111110100001 is a wasteful number, since it uses less digits than its factorization.

11111110100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33366697040 (or 33366697037 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 11111110100001 its reverse (10000101111111), we get a palindrome (21111211211112).

The spelling of 11111110100001 in words is "eleven trillion, one hundred eleven billion, one hundred ten million, one hundred thousand, one".