11111011010001 has 24 divisors (see below), whose sum is σ = 18350792208320. Its totient is φ = 6346100994336.

The previous prime is 11111011009999. The next prime is 11111011010027. The reversal of 11111011010001 is 10001011011111.

It is not a de Polignac number, because 11111011010001 - 2¹ = 11111011009999 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 (11111011010081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42203206 + ... + 42465663.

Almost surely, 2^{11111011010001} is an apocalyptic number.

It is an amenable number.

11111011010001 is a deficient number, since it is larger than the sum of its proper divisors (7239781198319).

11111011010001 is a wasteful number, since it uses less digits than its factorization.

11111011010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84670965 (or 84670962 counting only the distinct ones).

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

Adding to 11111011010001 its reverse (10001011011111), we get a palindrome (21112022021112).

The spelling of 11111011010001 in words is "eleven trillion, one hundred eleven billion, eleven million, ten thousand, one".