21143334412 has 12 divisors (see below), whose sum is σ = 37004648296. Its totient is φ = 10570577760.

The previous prime is 21143334397. The next prime is 21143334449. The reversal of 21143334412 is 21443334112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227889 + ... + 306952.

Almost surely, 2^21143334412 is an apocalyptic number.

It is an amenable number.

21143334412 is a deficient number, since it is larger than the sum of its proper divisors (15861313884).

21143334412 is a wasteful number, since it uses less digits than its factorization.

21143334412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544728 (or 544726 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

Adding to 21143334412 its reverse (21443334112), we get a palindrome (42586668524).

The spelling of 21143334412 in words is "twenty-one billion, one hundred forty-three million, three hundred thirty-four thousand, four hundred twelve".