21303144212 has 12 divisors (see below), whose sum is σ = 42606288480. Its totient is φ = 9129918936.

The previous prime is 21303144209. The next prime is 21303144251. The reversal of 21303144212 is 21244130312.

21303144212 is an admirable number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 380413262 + ... + 380413317.

It is an arithmetic number, because the mean of its divisors is an integer number (3550524040).

Almost surely, 2^21303144212 is an apocalyptic number.

It is an amenable number.

21303144212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21303144212 is a wasteful number, since it uses less digits than its factorization.

21303144212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760826590 (or 760826588 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21303144212 its reverse (21244130312), we get a palindrome (42547274524).

The spelling of 21303144212 in words is "twenty-one billion, three hundred three million, one hundred forty-four thousand, two hundred twelve".