11001011120021 has 16 divisors (see below), whose sum is σ = 11922094579584. Its totient is φ = 10090643459904.

The previous prime is 11001011120003. The next prime is 11001011120023. The reversal of 11001011120021 is 12002111010011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11001011120021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001011119984 and 11001011120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001011120023) 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, 11242055 + ... + 12181371.

It is an arithmetic number, because the mean of its divisors is an integer number (745130911224).

Almost surely, 2^{11001011120021} is an apocalyptic number.

It is an amenable number.

11001011120021 is a deficient number, since it is larger than the sum of its proper divisors (921083459563).

11001011120021 is a wasteful number, since it uses less digits than its factorization.

11001011120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945020.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11001011120021 its reverse (12002111010011), we get a palindrome (23003122130032).

The spelling of 11001011120021 in words is "eleven trillion, one billion, eleven million, one hundred twenty thousand, twenty-one".