11012000021 has 8 divisors (see below), whose sum is σ = 12014642304. Its totient is φ = 10009616320.

The previous prime is 11011999949. The next prime is 11012000023. The reversal of 11012000021 is 12000021011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-11012000021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011999972 and 11012000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012000023) 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, 30500 + ... + 151506.

It is an arithmetic number, because the mean of its divisors is an integer number (1501830288).

Almost surely, 2^11012000021 is an apocalyptic number.

11012000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11012000021 is a deficient number, since it is larger than the sum of its proper divisors (1002642283).

11012000021 is a wasteful number, since it uses less digits than its factorization.

11012000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129291.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 11012000021 its reverse (12000021011), we get a palindrome (23012021032).

The spelling of 11012000021 in words is "eleven billion, twelve million, twenty-one", and thus it is an aban number and an uban number.