11011011021 has 8 divisors (see below), whose sum is σ = 16312608960. Its totient is φ = 7340673996.

The previous prime is 11011011017. The next prime is 11011011023. The reversal of 11011011021 is 12011011011.

It is not a de Polignac number, because 11011011021 - 2² = 11011011017 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 = 11011010994 and 11011011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011011023) 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, 203907585 + ... + 203907638.

It is an arithmetic number, because the mean of its divisors is an integer number (2039076120).

Almost surely, 2^11011011021 is an apocalyptic number.

It is an amenable number.

11011011021 is a deficient number, since it is larger than the sum of its proper divisors (5301597939).

11011011021 is an equidigital number, since it uses as much as digits as its factorization.

11011011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407815232 (or 407815226 counting only the distinct ones).

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

Adding to 11011011021 its reverse (12011011011), we get a palindrome (23022022032).

The spelling of 11011011021 in words is "eleven billion, eleven million, eleven thousand, twenty-one".