21443511342231 has 192 divisors, whose sum is σ = 36525601382400. Its totient is φ = 11992940593920.

The previous prime is 21443511342167. The next prime is 21443511342251. The reversal of 21443511342231 is 13224311534412.

21443511342231 is a `hidden beast` number, since 2 + 1 + 44 + 35 + 11 + 342 + 231 = 666.

It is not a de Polignac number, because 21443511342231 - 2⁶ = 21443511342167 is a prime.

It is a super-2 number, since 2×21443511342231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443511342251) 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 191 ways as a sum of consecutive naturals, for example, 5231398620 + ... + 5231402718.

It is an arithmetic number, because the mean of its divisors is an integer number (190237507200).

Almost surely, 2^{21443511342231} is an apocalyptic number.

21443511342231 is a deficient number, since it is larger than the sum of its proper divisors (15082090040169).

21443511342231 is a wasteful number, since it uses less digits than its factorization.

21443511342231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4906 (or 4903 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

Adding to 21443511342231 its reverse (13224311534412), we get a palindrome (34667822876643).

The spelling of 21443511342231 in words is "twenty-one trillion, four hundred forty-three billion, five hundred eleven million, three hundred forty-two thousand, two hundred thirty-one".