21140241020011 has 4 divisors (see below), whose sum is σ = 21140375463432. Its totient is φ = 21140106576592.

The previous prime is 21140241019897. The next prime is 21140241020099. The reversal of 21140241020011 is 11002014204112.

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 21140241020011 - 2¹¹ = 21140241017963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21140241026011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66985570 + ... + 67300423.

It is an arithmetic number, because the mean of its divisors is an integer number (5285093865858).

Almost surely, 2^{21140241020011} is an apocalyptic number.

21140241020011 is a deficient number, since it is larger than the sum of its proper divisors (134443421).

21140241020011 is a wasteful number, since it uses less digits than its factorization.

21140241020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134443420.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21140241020011 its reverse (11002014204112), we get a palindrome (32142255224123).

The spelling of 21140241020011 in words is "twenty-one trillion, one hundred forty billion, two hundred forty-one million, twenty thousand, eleven".