21112110010 has 16 divisors (see below), whose sum is σ = 38810347776. Its totient is φ = 8265166288.

The previous prime is 21112109999. The next prime is 21112110031. The reversal of 21112110010 is 1001121112.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22459222 + ... + 22460161.

It is an arithmetic number, because the mean of its divisors is an integer number (2425646736).

Almost surely, 2^21112110010 is an apocalyptic number.

21112110010 is a deficient number, since it is larger than the sum of its proper divisors (17698237766).

21112110010 is a wasteful number, since it uses less digits than its factorization.

21112110010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44919437.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21112110010 its reverse (1001121112), we get a palindrome (22113231122).

The spelling of 21112110010 in words is "twenty-one billion, one hundred twelve million, one hundred ten thousand, ten".