21201310012 has 12 divisors (see below), whose sum is σ = 37127837656. Its totient is φ = 10593356400.

The previous prime is 21201310007. The next prime is 21201310033. The reversal of 21201310012 is 21001310212.

It is a junction number, because it is equal to n+sod(n) for n = 21201309974 and 21201310001.

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 3 ways as a sum of consecutive naturals, for example, 1818114 + ... + 1829737.

Almost surely, 2^21201310012 is an apocalyptic number.

It is an amenable number.

21201310012 is a deficient number, since it is larger than the sum of its proper divisors (15926527644).

21201310012 is a wasteful number, since it uses less digits than its factorization.

21201310012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649308 (or 3649306 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21201310012 its reverse (21001310212), we get a palindrome (42202620224).

The spelling of 21201310012 in words is "twenty-one billion, two hundred one million, three hundred ten thousand, twelve".