21000011110 has 16 divisors (see below), whose sum is σ = 40707714096. Its totient is φ = 7753850208.

The previous prime is 21000011089. The next prime is 21000011147. The reversal of 21000011110 is 1111000012.

21000011110 is a modest number, since divided by 11110 gives 210 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 21000011093 and 21000011102.

It is a congruent 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, 80769144 + ... + 80769403.

It is an arithmetic number, because the mean of its divisors is an integer number (2544232131).

Almost surely, 2^21000011110 is an apocalyptic number.

21000011110 is a deficient number, since it is larger than the sum of its proper divisors (19707702986).

21000011110 is a wasteful number, since it uses less digits than its factorization.

21000011110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161538567.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 21000011110 its reverse (1111000012), we get a palindrome (22111011122).

The spelling of 21000011110 in words is "twenty-one billion, eleven thousand, one hundred ten".