21143224302 has 24 divisors (see below), whose sum is σ = 42767011896. Its totient is φ = 6968537664.

The previous prime is 21143224279. The next prime is 21143224307. The reversal of 21143224302 is 20342234112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143224307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174913 + ... + 269964.

It is an arithmetic number, because the mean of its divisors is an integer number (1781958829).

Almost surely, 2^21143224302 is an apocalyptic number.

21143224302 is an abundant number, since it is smaller than the sum of its proper divisors (21623787594).

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

21143224302 is an equidigital number, since it uses as much as digits as its factorization.

21143224302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445060 (or 444971 counting only the distinct ones).

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

Adding to 21143224302 its reverse (20342234112), we get a palindrome (41485458414).

The spelling of 21143224302 in words is "twenty-one billion, one hundred forty-three million, two hundred twenty-four thousand, three hundred two".