21120101120011 has 4 divisors (see below), whose sum is σ = 21325150645552. Its totient is φ = 20915051594472.

The previous prime is 21120101120003. The next prime is 21120101120029. The reversal of 21120101120011 is 11002110102112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21120101120011 - 2³ = 21120101120003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21120101119973 and 21120101120000.

It is not an unprimeable number, because it can be changed into a prime (21120101121011) 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 3 ways as a sum of consecutive naturals, for example, 102524762616 + ... + 102524762821.

It is an arithmetic number, because the mean of its divisors is an integer number (5331287661388).

Almost surely, 2^{21120101120011} is an apocalyptic number.

21120101120011 is a deficient number, since it is larger than the sum of its proper divisors (205049525541).

21120101120011 is a wasteful number, since it uses less digits than its factorization.

21120101120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205049525540.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21120101120011 its reverse (11002110102112), we get a palindrome (32122211222123).

The spelling of 21120101120011 in words is "twenty-one trillion, one hundred twenty billion, one hundred one million, one hundred twenty thousand, eleven".