21330111112 has 32 divisors (see below), whose sum is σ = 40262976000. Its totient is φ = 10593500544.

The previous prime is 21330111109. The next prime is 21330111203. The reversal of 21330111112 is 21111103312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955308 + ... + 977380.

It is an arithmetic number, because the mean of its divisors is an integer number (1258218000).

Almost surely, 2^21330111112 is an apocalyptic number.

It is an amenable number.

21330111112 is a deficient number, since it is larger than the sum of its proper divisors (18932864888).

21330111112 is a wasteful number, since it uses less digits than its factorization.

21330111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22885 (or 22881 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21330111112 its reverse (21111103312), we get a palindrome (42441214424).

The spelling of 21330111112 in words is "twenty-one billion, three hundred thirty million, one hundred eleven thousand, one hundred twelve".