21300212112 has 20 divisors (see below), whose sum is σ = 55025548080. Its totient is φ = 7100070688.

The previous prime is 21300212083. The next prime is 21300212123. The reversal of 21300212112 is 21121200312.

It is a junction number, because it is equal to n+sod(n) for n = 21300212091 and 21300212100.

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, 221877162 + ... + 221877257.

It is an arithmetic number, because the mean of its divisors is an integer number (2751277404).

Almost surely, 2^21300212112 is an apocalyptic number.

It is an amenable number.

21300212112 is an abundant number, since it is smaller than the sum of its proper divisors (33725335968).

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

21300212112 is a wasteful number, since it uses less digits than its factorization.

21300212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443754430 (or 443754424 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21300212112 its reverse (21121200312), we get a palindrome (42421412424).

The spelling of 21300212112 in words is "twenty-one billion, three hundred million, two hundred twelve thousand, one hundred twelve".