21120111010011 has 16 divisors (see below), whose sum is σ = 30565103120384. Its totient is φ = 12894652872864.

The previous prime is 21120111009953. The next prime is 21120111010027. The reversal of 21120111010011 is 11001011102112.

It is not a de Polignac number, because 21120111010011 - 2²⁶ = 21120043901147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120111010211) 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, 2132047441 + ... + 2132057346.

It is an arithmetic number, because the mean of its divisors is an integer number (1910318945024).

Almost surely, 2^{21120111010011} is an apocalyptic number.

21120111010011 is a deficient number, since it is larger than the sum of its proper divisors (9444992110373).

21120111010011 is a wasteful number, since it uses less digits than its factorization.

21120111010011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264104930.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21120111010011 its reverse (11001011102112), we get a palindrome (32121122112123).

The spelling of 21120111010011 in words is "twenty-one trillion, one hundred twenty billion, one hundred eleven million, ten thousand, eleven".