21233016712 has 8 divisors (see below), whose sum is σ = 39811906350. Its totient is φ = 10616508352.

The previous prime is 21233016689. The next prime is 21233016719. The reversal of 21233016712 is 21761033212.

It can be written as a sum of positive squares in only one way, i.e., 18418289796 + 2814726916 = 135714^2 + 53054^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (21233016719) 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 as a sum of consecutive naturals, namely, 1327063537 + ... + 1327063552.

Almost surely, 2^21233016712 is an apocalyptic number.

It is an amenable number.

21233016712 is a deficient number, since it is larger than the sum of its proper divisors (18578889638).

21233016712 is a wasteful number, since it uses less digits than its factorization.

21233016712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654127095 (or 2654127091 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 21233016712 its reverse (21761033212), we get a palindrome (42994049924).

The spelling of 21233016712 in words is "twenty-one billion, two hundred thirty-three million, sixteen thousand, seven hundred twelve".