21443223231134 has 32 divisors (see below), whose sum is σ = 32530579361280. Its totient is φ = 10599933028608.

The previous prime is 21443223231127. The next prime is 21443223231149. The reversal of 21443223231134 is 43113232234412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21443223231094 and 21443223231103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2021605259 + ... + 2021615865.

It is an arithmetic number, because the mean of its divisors is an integer number (1016580605040).

Almost surely, 2^{21443223231134} is an apocalyptic number.

21443223231134 is a deficient number, since it is larger than the sum of its proper divisors (11087356130146).

21443223231134 is a wasteful number, since it uses less digits than its factorization.

21443223231134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20672.

The product of its digits is 82944, while the sum is 35.

Adding to 21443223231134 its reverse (43113232234412), we get a palindrome (64556455465546).

The spelling of 21443223231134 in words is "twenty-one trillion, four hundred forty-three billion, two hundred twenty-three million, two hundred thirty-one thousand, one hundred thirty-four".