11011021011 has 20 divisors (see below), whose sum is σ = 16454676744. Its totient is φ = 7337952000.

The previous prime is 11011021009. The next prime is 11011021039. The reversal of 11011021011 is 11012011011.

It is not a de Polignac number, because 11011021011 - 2¹ = 11011021009 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 = 11011020984 and 11011021002.

It is not an unprimeable number, because it can be changed into a prime (11011021711) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 207091 + ... + 254771.

Almost surely, 2^11011021011 is an apocalyptic number.

11011021011 is a deficient number, since it is larger than the sum of its proper divisors (5443655733).

11011021011 is an equidigital number, since it uses as much as digits as its factorization.

11011021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50544 (or 50535 counting only the distinct ones).

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

Adding to 11011021011 its reverse (11012011011), we get a palindrome (22023032022).

The spelling of 11011021011 in words is "eleven billion, eleven million, twenty-one thousand, eleven".