21322123143 has 8 divisors (see below), whose sum is σ = 28437424368. Its totient is φ = 14210785344.

The previous prime is 21322123127. The next prime is 21322123157. The reversal of 21322123143 is 34132122312.

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

It is not a de Polignac number, because 21322123143 - 2⁴ = 21322123127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322124143) 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, 978280 + ... + 999837.

It is an arithmetic number, because the mean of its divisors is an integer number (3554678046).

Almost surely, 2^21322123143 is an apocalyptic number.

21322123143 is a deficient number, since it is larger than the sum of its proper divisors (7115301225).

21322123143 is a wasteful number, since it uses less digits than its factorization.

21322123143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981713.

The product of its digits is 1728, while the sum is 24.

Adding to 21322123143 its reverse (34132122312), we get a palindrome (55454245455).

The spelling of 21322123143 in words is "twenty-one billion, three hundred twenty-two million, one hundred twenty-three thousand, one hundred forty-three".