21300111012 has 48 divisors (see below), whose sum is σ = 51121667520. Its totient is φ = 6897566592.

The previous prime is 21300110971. The next prime is 21300111013. The reversal of 21300111012 is 21011100312.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (21300111013) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 256198 + ... + 328994.

It is an arithmetic number, because the mean of its divisors is an integer number (1065034740).

Almost surely, 2^21300111012 is an apocalyptic number.

It is an amenable number.

21300111012 is an abundant number, since it is smaller than the sum of its proper divisors (29821556508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21300111012 is a wasteful number, since it uses less digits than its factorization.

21300111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73500 (or 73498 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21300111012 its reverse (21011100312), we get a palindrome (42311211324).

The spelling of 21300111012 in words is "twenty-one billion, three hundred million, one hundred eleven thousand, twelve".