21120010012011 has 8 divisors (see below), whose sum is σ = 28167820409344. Its totient is φ = 14076103144680.

The previous prime is 21120010012001. The next prime is 21120010012043. The reversal of 21120010012011 is 11021001002112.

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

It is not a de Polignac number, because 21120010012011 - 2¹³ = 21120010003819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120010012001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 975869875 + ... + 975891516.

It is an arithmetic number, because the mean of its divisors is an integer number (3520977551168).

Almost surely, 2^{21120010012011} is an apocalyptic number.

21120010012011 is a deficient number, since it is larger than the sum of its proper divisors (7047810397333).

21120010012011 is a wasteful number, since it uses less digits than its factorization.

21120010012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951765001.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21120010012011 its reverse (11021001002112), we get a palindrome (32141011014123).

The spelling of 21120010012011 in words is "twenty-one trillion, one hundred twenty billion, ten million, twelve thousand, eleven".