21000211112 has 64 divisors (see below), whose sum is σ = 42038092800. Its totient is φ = 9800663040.

The previous prime is 21000211081. The next prime is 21000211117. The reversal of 21000211112 is 21111200012.

It is a junction number, because it is equal to n+sod(n) for n = 21000211093 and 21000211102.

It is not an unprimeable number, because it can be changed into a prime (21000211117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9946937 + ... + 9949047.

It is an arithmetic number, because the mean of its divisors is an integer number (656845200).

Almost surely, 2^21000211112 is an apocalyptic number.

It is an amenable number.

21000211112 is an abundant number, since it is smaller than the sum of its proper divisors (21037881688).

21000211112 is a wasteful number, since it uses less digits than its factorization.

21000211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706 (or 2702 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21000211112 its reverse (21111200012), we get a palindrome (42111411124).

The spelling of 21000211112 in words is "twenty-one billion, two hundred eleven thousand, one hundred twelve".