21443221122123 has 8 divisors (see below), whose sum is σ = 28796651867200. Its totient is φ = 14192635562568.

The previous prime is 21443221121999. The next prime is 21443221122139. The reversal of 21443221122123 is 32122112234412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21443221122123 - 2¹³ = 21443221113931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21443221122173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25711295893 + ... + 25711296726.

It is an arithmetic number, because the mean of its divisors is an integer number (3599581483400).

Almost surely, 2^{21443221122123} is an apocalyptic number.

21443221122123 is a deficient number, since it is larger than the sum of its proper divisors (7353430745077).

21443221122123 is a wasteful number, since it uses less digits than its factorization.

21443221122123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51422592761.

The product of its digits is 9216, while the sum is 30.

Adding to 21443221122123 its reverse (32122112234412), we get a palindrome (53565333356535).

The spelling of 21443221122123 in words is "twenty-one trillion, four hundred forty-three billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-three".