21143043222 has 48 divisors (see below), whose sum is σ = 49209217200. Its totient is φ = 6038501952.

The previous prime is 21143043209. The next prime is 21143043223. The reversal of 21143043222 is 22234034112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21143043192 and 21143043201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143043223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 821404 + ... + 846752.

It is an arithmetic number, because the mean of its divisors is an integer number (1025192025).

Almost surely, 2^21143043222 is an apocalyptic number.

21143043222 is an abundant number, since it is smaller than the sum of its proper divisors (28066173978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21143043222 is a wasteful number, since it uses less digits than its factorization.

21143043222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28205 (or 28198 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21143043222 its reverse (22234034112), we get a palindrome (43377077334).

The spelling of 21143043222 in words is "twenty-one billion, one hundred forty-three million, forty-three thousand, two hundred twenty-two".