21102001110 has 24 divisors (see below), whose sum is σ = 54865203120. Its totient is φ = 5627200272.

The previous prime is 21102001099. The next prime is 21102001139. The reversal of 21102001110 is 1110020112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21102001092 and 21102001101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117233250 + ... + 117233429.

It is an arithmetic number, because the mean of its divisors is an integer number (2286050130).

Almost surely, 2^21102001110 is an apocalyptic number.

21102001110 is an abundant number, since it is smaller than the sum of its proper divisors (33763202010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21102001110 is a wasteful number, since it uses less digits than its factorization.

21102001110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234466692 (or 234466689 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21102001110 its reverse (1110020112), we get a palindrome (22212021222).

The spelling of 21102001110 in words is "twenty-one billion, one hundred two million, one thousand, one hundred ten".