21143323143203 has 4 divisors (see below), whose sum is σ = 21221922857760. Its totient is φ = 21064723428648.

The previous prime is 21143323143193. The next prime is 21143323143263. The reversal of 21143323143203 is 30234132334112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21143323143203 is a prime.

It is a super-2 number, since 2×21143323143203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21143323143203.

It is not an unprimeable number, because it can be changed into a prime (21143323143263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39299856875 + ... + 39299857412.

It is an arithmetic number, because the mean of its divisors is an integer number (5305480714440).

Almost surely, 2^{21143323143203} is an apocalyptic number.

21143323143203 is a deficient number, since it is larger than the sum of its proper divisors (78599714557).

21143323143203 is an equidigital number, since it uses as much as digits as its factorization.

21143323143203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78599714556.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 21143323143203 its reverse (30234132334112), we get a palindrome (51377455477315).

The spelling of 21143323143203 in words is "twenty-one trillion, one hundred forty-three billion, three hundred twenty-three million, one hundred forty-three thousand, two hundred three".