11111111109901 has 8 divisors (see below), whose sum is σ = 12648221342784. Its totient is φ = 9661835747520.

The previous prime is 11111111109881. The next prime is 11111111109911. The reversal of 11111111109901 is 10990111111111.

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

It is not a de Polignac number, because 11111111109901 - 2¹⁷ = 11111110978829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11111111109901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111111109911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21958717356 + ... + 21958717861.

It is an arithmetic number, because the mean of its divisors is an integer number (1581027667848).

Almost surely, 2^{11111111109901} is an apocalyptic number.

11111111109901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11111111109901 is a deficient number, since it is larger than the sum of its proper divisors (1537110232883).

11111111109901 is a wasteful number, since it uses less digits than its factorization.

11111111109901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43917435251.

The product of its (nonzero) digits is 81, while the sum is 28.

The spelling of 11111111109901 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred nine thousand, nine hundred one".