21543341421322 has 16 divisors (see below), whose sum is σ = 38122779290112. Its totient is φ = 8935026395760.

The previous prime is 21543341421311. The next prime is 21543341421403. The reversal of 21543341421322 is 22312414334512.

It is a super-2 number, since 2×21543341421322² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24819517333 + ... + 24819518200.

It is an arithmetic number, because the mean of its divisors is an integer number (2382673705632).

Almost surely, 2^{21543341421322} is an apocalyptic number.

21543341421322 is a deficient number, since it is larger than the sum of its proper divisors (16579437868790).

21543341421322 is a wasteful number, since it uses less digits than its factorization.

21543341421322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49639035573.

The product of its digits is 138240, while the sum is 37.

Adding to 21543341421322 its reverse (22312414334512), we get a palindrome (43855755755834).

The spelling of 21543341421322 in words is "twenty-one trillion, five hundred forty-three billion, three hundred forty-one million, four hundred twenty-one thousand, three hundred twenty-two".