21200011012 has 12 divisors (see below), whose sum is σ = 37103418576. Its totient is φ = 10599034280.

The previous prime is 21200010991. The next prime is 21200011043. The reversal of 21200011012 is 21011000212.

It is a self number, because there is not a number n which added to its sum of digits gives 21200011012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192538 + ... + 281905.

It is an arithmetic number, because the mean of its divisors is an integer number (3091951548).

Almost surely, 2^21200011012 is an apocalyptic number.

It is an amenable number.

21200011012 is a deficient number, since it is larger than the sum of its proper divisors (15903407564).

21200011012 is a wasteful number, since it uses less digits than its factorization.

21200011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485618 (or 485616 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21200011012 its reverse (21011000212), we get a palindrome (42211011224).

The spelling of 21200011012 in words is "twenty-one billion, two hundred million, eleven thousand, twelve".