21143144202 has 32 divisors (see below), whose sum is σ = 44235979200. Its totient is φ = 6728227968.

The previous prime is 21143144201. The next prime is 21143144237. The reversal of 21143144202 is 20244134112.

It is not an unprimeable number, because it can be changed into a prime (21143144201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667168 + ... + 698139.

It is an arithmetic number, because the mean of its divisors is an integer number (1382374350).

Almost surely, 2^21143144202 is an apocalyptic number.

21143144202 is an abundant number, since it is smaller than the sum of its proper divisors (23092834998).

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

21143144202 is a wasteful number, since it uses less digits than its factorization.

21143144202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365430.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21143144202 its reverse (20244134112), we get a palindrome (41387278314).

The spelling of 21143144202 in words is "twenty-one billion, one hundred forty-three million, one hundred forty-four thousand, two hundred two".