21000302111112 has 128 divisors (see below), whose sum is σ = 53822099548800. Its totient is φ = 6825586839552.

The previous prime is 21000302111081. The next prime is 21000302111119. The reversal of 21000302111112 is 21111120300012.

It is a junction number, because it is equal to n+sod(n) for n = 21000302111091 and 21000302111100.

It is not an unprimeable number, because it can be changed into a prime (21000302111119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 590392464 + ... + 590428032.

It is an arithmetic number, because the mean of its divisors is an integer number (420485152725).

Almost surely, 2^{21000302111112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21000302111112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26911049774400).

21000302111112 is an abundant number, since it is smaller than the sum of its proper divisors (32821797437688).

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

21000302111112 is a wasteful number, since it uses less digits than its factorization.

21000302111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38487 (or 38483 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21000302111112 its reverse (21111120300012), we get a palindrome (42111422411124).

The spelling of 21000302111112 in words is "twenty-one trillion, three hundred two million, one hundred eleven thousand, one hundred twelve".