21112101110 has 16 divisors (see below), whose sum is σ = 38067653376. Its totient is φ = 8430202368.

The previous prime is 21112101103. The next prime is 21112101133. The reversal of 21112101110 is 1110121112.

It is a junction number, because it is equal to n+sod(n) for n = 21112101091 and 21112101100.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1823702 + ... + 1835241.

It is an arithmetic number, because the mean of its divisors is an integer number (2379228336).

Almost surely, 2^21112101110 is an apocalyptic number.

21112101110 is a deficient number, since it is larger than the sum of its proper divisors (16955552266).

21112101110 is a wasteful number, since it uses less digits than its factorization.

21112101110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659527.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21112101110 its reverse (1110121112), we get a palindrome (22222222222).

The spelling of 21112101110 in words is "twenty-one billion, one hundred twelve million, one hundred one thousand, one hundred ten".