11001121000021 has 8 divisors (see below), whose sum is σ = 11026333894400. Its totient is φ = 10975908803760.

The previous prime is 11001120999997. The next prime is 11001121000027. The reversal of 11001121000021 is 12000012110011.

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

It is a cyclic number.

It is not a de Polignac number, because 11001121000021 - 2¹⁵ = 11001120967253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001120999971 and 11001121000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001121000027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44365060 + ... + 44612338.

It is an arithmetic number, because the mean of its divisors is an integer number (1378291736800).

Almost surely, 2^{11001121000021} is an apocalyptic number.

It is an amenable number.

11001121000021 is a deficient number, since it is larger than the sum of its proper divisors (25212894379).

11001121000021 is a wasteful number, since it uses less digits than its factorization.

11001121000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349059.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11001121000021 its reverse (12000012110011), we get a palindrome (23001133110032).

The spelling of 11001121000021 in words is "eleven trillion, one billion, one hundred twenty-one million, twenty-one", and thus it is an aban number.