21120020100011 has 8 divisors (see below), whose sum is σ = 24321419003904. Its totient is φ = 17964684489960.

The previous prime is 21120020099951. The next prime is 21120020100029. The reversal of 21120020100011 is 11000102002112.

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 21120020100011 - 2²² = 21120015905707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21120020099965 and 21120020100001.

It is not an unprimeable number, because it can be changed into a prime (21120020100031) 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, 11515822475 + ... + 11515824308.

It is an arithmetic number, because the mean of its divisors is an integer number (3040177375488).

Almost surely, 2^{21120020100011} is an apocalyptic number.

21120020100011 is a deficient number, since it is larger than the sum of its proper divisors (3201398903893).

21120020100011 is a wasteful number, since it uses less digits than its factorization.

21120020100011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23031646921.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21120020100011 its reverse (11000102002112), we get a palindrome (32120122102123).

The spelling of 21120020100011 in words is "twenty-one trillion, one hundred twenty billion, twenty million, one hundred thousand, eleven".