11111101001011 has 8 divisors (see below), whose sum is σ = 12121225684848. Its totient is φ = 10100980416000.

The previous prime is 11111101001009. The next prime is 11111101001069. The reversal of 11111101001011 is 11010010111111.

It is a happy number.

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 11111101001011 - 2¹ = 11111101001009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111101001071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8461891 + ... + 9686371.

It is an arithmetic number, because the mean of its divisors is an integer number (1515153210606).

Almost surely, 2^{11111101001011} is an apocalyptic number.

11111101001011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11111101001011 is a deficient number, since it is larger than the sum of its proper divisors (1010124683837).

11111101001011 is a wasteful number, since it uses less digits than its factorization.

11111101001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049413.

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 11111101001011 its reverse (11010010111111), we get a palindrome (22121111112122).

It can be divided in two parts, 1111110100 and 1011, that added together give a palindrome (1111111111).

The spelling of 11111101001011 in words is "eleven trillion, one hundred eleven billion, one hundred one million, one thousand, eleven".