11011000021 has 16 divisors (see below), whose sum is σ = 12883248000. Its totient is φ = 9215713728.

The previous prime is 11011000003. The next prime is 11011000043. The reversal of 11011000021 is 12000011011.

It is a cyclic number.

It is not a de Polignac number, because 11011000021 - 2²³ = 11002611413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a junction number, because it is equal to n+sod(n) for n = 11010999968 and 11011000013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011000051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27930 + ... + 151003.

It is an arithmetic number, because the mean of its divisors is an integer number (805203000).

Almost surely, 2^11011000021 is an apocalyptic number.

It is an amenable number.

11011000021 is a deficient number, since it is larger than the sum of its proper divisors (1872247979).

11011000021 is a wasteful number, since it uses less digits than its factorization.

11011000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179148.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 11011000021 its reverse (12000011011), we get a palindrome (23011011032).

The spelling of 11011000021 in words is "eleven billion, eleven million, twenty-one", and thus it is an aban number and an uban number.