21143442312202 has 24 divisors (see below), whose sum is σ = 36893584831680. Its totient is φ = 9061368314040.

The previous prime is 21143442312197. The next prime is 21143442312241. The reversal of 21143442312202 is 20221324434112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7368927 + ... + 9827917.

It is an arithmetic number, because the mean of its divisors is an integer number (1537232701320).

Almost surely, 2^{21143442312202} is an apocalyptic number.

21143442312202 is a deficient number, since it is larger than the sum of its proper divisors (15750142519478).

21143442312202 is a wasteful number, since it uses less digits than its factorization.

21143442312202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546746 (or 2546739 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21143442312202 its reverse (20221324434112), we get a palindrome (41364766746314).

The spelling of 21143442312202 in words is "twenty-one trillion, one hundred forty-three billion, four hundred forty-two million, three hundred twelve thousand, two hundred two".