21443022212 has 24 divisors (see below), whose sum is σ = 37749573120. Its totient is φ = 10657513440.

The previous prime is 21443022203. The next prime is 21443022229. The reversal of 21443022212 is 21222034412.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1105058 + ... + 1124294.

It is an arithmetic number, because the mean of its divisors is an integer number (1572898880).

Almost surely, 2^21443022212 is an apocalyptic number.

It is an amenable number.

21443022212 is a deficient number, since it is larger than the sum of its proper divisors (16306550908).

21443022212 is a wasteful number, since it uses less digits than its factorization.

21443022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20891 (or 20889 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21443022212 its reverse (21222034412), we get a palindrome (42665056624).

The spelling of 21443022212 in words is "twenty-one billion, four hundred forty-three million, twenty-two thousand, two hundred twelve".