21300022012 has 24 divisors (see below), whose sum is σ = 38203512480. Its totient is φ = 10384995840.

The previous prime is 21300022001. The next prime is 21300022031. The reversal of 21300022012 is 21022000312.

It is a junction number, because it is equal to n+sod(n) for n = 21300021983 and 21300022001.

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 7 ways as a sum of consecutive naturals, for example, 302548 + ... + 366244.

It is an arithmetic number, because the mean of its divisors is an integer number (1591813020).

Almost surely, 2^21300022012 is an apocalyptic number.

It is an amenable number.

21300022012 is a deficient number, since it is larger than the sum of its proper divisors (16903490468).

21300022012 is a wasteful number, since it uses less digits than its factorization.

21300022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65781 (or 65779 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21300022012 its reverse (21022000312), we get a palindrome (42322022324).

The spelling of 21300022012 in words is "twenty-one billion, three hundred million, twenty-two thousand, twelve".