21300002012 has 96 divisors (see below), whose sum is σ = 41364449280. Its totient is φ = 9562291200.

The previous prime is 21300001993. The next prime is 21300002029. The reversal of 21300002012 is 21020000312.

It is a happy number.

It is a super-2 number, since 2×21300002012² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21300001984 and 21300002002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46004093 + ... + 46004555.

It is an arithmetic number, because the mean of its divisors is an integer number (430879680).

Almost surely, 2^21300002012 is an apocalyptic number.

It is an amenable number.

21300002012 is a deficient number, since it is larger than the sum of its proper divisors (20064447268).

21300002012 is a wasteful number, since it uses less digits than its factorization.

21300002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21300002012 its reverse (21020000312), we get a palindrome (42320002324).

The spelling of 21300002012 in words is "twenty-one billion, three hundred million, two thousand, twelve".