21214222404343 has 16 divisors (see below), whose sum is σ = 22438731974400. Its totient is φ = 20015980494400.

The previous prime is 21214222404311. The next prime is 21214222404407. The reversal of 21214222404343 is 34340422241212.

It is a cyclic number.

It is not a de Polignac number, because 21214222404343 - 2⁵ = 21214222404311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21214222404299 and 21214222404308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214222401343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11509333 + ... + 13224718.

It is an arithmetic number, because the mean of its divisors is an integer number (1402420748400).

Almost surely, 2^{21214222404343} is an apocalyptic number.

21214222404343 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21214222404343 is a deficient number, since it is larger than the sum of its proper divisors (1224509570057).

21214222404343 is a wasteful number, since it uses less digits than its factorization.

21214222404343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24734582.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 21214222404343 its reverse (34340422241212), we get a palindrome (55554644645555).

The spelling of 21214222404343 in words is "twenty-one trillion, two hundred fourteen billion, two hundred twenty-two million, four hundred four thousand, three hundred forty-three".