21344340232211 has 4 divisors (see below), whose sum is σ = 21344605911672. Its totient is φ = 21344074552752.

The previous prime is 21344340232129. The next prime is 21344340232219. The reversal of 21344340232211 is 11223204344312.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21344340232211 is a prime.

It is a super-2 number, since 2×21344340232211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21344340232219) 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, 132719186 + ... + 132879911.

It is an arithmetic number, because the mean of its divisors is an integer number (5336151477918).

Almost surely, 2^{21344340232211} is an apocalyptic number.

21344340232211 is a deficient number, since it is larger than the sum of its proper divisors (265679461).

21344340232211 is an equidigital number, since it uses as much as digits as its factorization.

21344340232211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265679460.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21344340232211 its reverse (11223204344312), we get a palindrome (32567544576523).

The spelling of 21344340232211 in words is "twenty-one trillion, three hundred forty-four billion, three hundred forty million, two hundred thirty-two thousand, two hundred eleven".