21342005211 has 32 divisors (see below), whose sum is σ = 29588715520. Its totient is φ = 13668652800.

The previous prime is 21342005203. The next prime is 21342005231. The reversal of 21342005211 is 11250024312.

It is not a de Polignac number, because 21342005211 - 2³ = 21342005203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342005231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18902895 + ... + 18904023.

It is an arithmetic number, because the mean of its divisors is an integer number (924647360).

Almost surely, 2^21342005211 is an apocalyptic number.

21342005211 is a deficient number, since it is larger than the sum of its proper divisors (8246710309).

21342005211 is a wasteful number, since it uses less digits than its factorization.

21342005211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21342005211 its reverse (11250024312), we get a palindrome (32592029523).

The spelling of 21342005211 in words is "twenty-one billion, three hundred forty-two million, five thousand, two hundred eleven".