21112111010011 has 16 divisors (see below), whose sum is σ = 25466119571200. Its totient is φ = 17097707471328.

The previous prime is 21112111009991. The next prime is 21112111010077. The reversal of 21112111010011 is 11001011121112.

It is a cyclic number.

It is not a de Polignac number, because 21112111010011 - 2¹¹ = 21112111007963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21112111009973 and 21112111010000.

It is not an unprimeable number, because it can be changed into a prime (21112111011011) 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, 212735481 + ... + 212834698.

It is an arithmetic number, because the mean of its divisors is an integer number (1591632473200).

Almost surely, 2^{21112111010011} is an apocalyptic number.

21112111010011 is a deficient number, since it is larger than the sum of its proper divisors (4354008561189).

21112111010011 is a wasteful number, since it uses less digits than its factorization.

21112111010011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425570578.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 21112111010011 its reverse (11001011121112), we get a palindrome (32113122131123).

The spelling of 21112111010011 in words is "twenty-one trillion, one hundred twelve billion, one hundred eleven million, ten thousand, eleven".