11111020011 has 48 divisors (see below), whose sum is σ = 20125699776. Its totient is φ = 5750155008.

The previous prime is 11111020001. The next prime is 11111020033. The reversal of 11111020011 is 11002011111.

It is not a de Polignac number, because 11111020011 - 2⁶ = 11111019947 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 11111019975 and 11111020002.

It is not an unprimeable number, because it can be changed into a prime (11111020001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84580 + ... + 171393.

It is an arithmetic number, because the mean of its divisors is an integer number (419285412).

Almost surely, 2^11111020011 is an apocalyptic number.

11111020011 is a deficient number, since it is larger than the sum of its proper divisors (9014679765).

11111020011 is a wasteful number, since it uses less digits than its factorization.

11111020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256052 (or 256049 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11111020011 its reverse (11002011111), we get a palindrome (22113031122).

The spelling of 11111020011 in words is "eleven billion, one hundred eleven million, twenty thousand, eleven".