21342102235211 has 16 divisors (see below), whose sum is σ = 21442665150720. Its totient is φ = 21241727493600.

The previous prime is 21342102235199. The next prime is 21342102235213. The reversal of 21342102235211 is 11253220124312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21342102235211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342102235213) 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 15 ways as a sum of consecutive naturals, for example, 1585234466 + ... + 1585247928.

It is an arithmetic number, because the mean of its divisors is an integer number (1340166571920).

Almost surely, 2^{21342102235211} is an apocalyptic number.

21342102235211 is a deficient number, since it is larger than the sum of its proper divisors (100562915509).

21342102235211 is a wasteful number, since it uses less digits than its factorization.

21342102235211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19906.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 21342102235211 its reverse (11253220124312), we get a palindrome (32595322359523).

The spelling of 21342102235211 in words is "twenty-one trillion, three hundred forty-two billion, one hundred two million, two hundred thirty-five thousand, two hundred eleven".