11011230021 has 96 divisors (see below), whose sum is σ = 17610493824. Its totient is φ = 6091571200.

The previous prime is 11011229993. The next prime is 11011230047. The reversal of 11011230021 is 12003211011.

It is not a de Polignac number, because 11011230021 - 2²² = 11007035717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11011229979 and 11011230006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011230071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42845125 + ... + 42845381.

It is an arithmetic number, because the mean of its divisors is an integer number (183442644).

Almost surely, 2^11011230021 is an apocalyptic number.

11011230021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11011230021 is a deficient number, since it is larger than the sum of its proper divisors (6599263803).

11011230021 is a wasteful number, since it uses less digits than its factorization.

11011230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 11011230021 its reverse (12003211011), we get a palindrome (23014441032).

The spelling of 11011230021 in words is "eleven billion, eleven million, two hundred thirty thousand, twenty-one".