21014420011 has 8 divisors (see below), whose sum is σ = 22639462160. Its totient is φ = 19390599072.

The previous prime is 21014420003. The next prime is 21014420057. The reversal of 21014420011 is 11002441012.

It is a happy number.

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

It is not a de Polignac number, because 21014420011 - 2³ = 21014420003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21014420311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269400 + ... + 338533.

It is an arithmetic number, because the mean of its divisors is an integer number (2829932770).

Almost surely, 2^21014420011 is an apocalyptic number.

21014420011 is a deficient number, since it is larger than the sum of its proper divisors (1625042149).

21014420011 is a wasteful number, since it uses less digits than its factorization.

21014420011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610605.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21014420011 its reverse (11002441012), we get a palindrome (32016861023).

The spelling of 21014420011 in words is "twenty-one billion, fourteen million, four hundred twenty thousand, eleven".