21443551111045 has 32 divisors (see below), whose sum is σ = 30357385445376. Its totient is φ = 14229619444800.

The previous prime is 21443551111039. The next prime is 21443551111049. The reversal of 21443551111045 is 54011115534412.

It is not a de Polignac number, because 21443551111045 - 2⁵ = 21443551111013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21443551110995 and 21443551111013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443551111049) 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 31 ways as a sum of consecutive naturals, for example, 149058100 + ... + 149201890.

It is an arithmetic number, because the mean of its divisors is an integer number (948668295168).

Almost surely, 2^{21443551111045} is an apocalyptic number.

It is an amenable number.

21443551111045 is a deficient number, since it is larger than the sum of its proper divisors (8913834334331).

21443551111045 is a wasteful number, since it uses less digits than its factorization.

21443551111045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281281.

The product of its (nonzero) digits is 48000, while the sum is 37.

Adding to 21443551111045 its reverse (54011115534412), we get a palindrome (75454666645457).

The spelling of 21443551111045 in words is "twenty-one trillion, four hundred forty-three billion, five hundred fifty-one million, one hundred eleven thousand, forty-five".