21010221110 has 8 divisors (see below), whose sum is σ = 37818398016. Its totient is φ = 8404088440.

The previous prime is 21010221073. The next prime is 21010221121. The reversal of 21010221110 is 1112201012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×21010221110³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21010221091 and 21010221100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050511046 + ... + 1050511065.

It is an arithmetic number, because the mean of its divisors is an integer number (4727299752).

Almost surely, 2^21010221110 is an apocalyptic number.

21010221110 is a deficient number, since it is larger than the sum of its proper divisors (16808176906).

21010221110 is a wasteful number, since it uses less digits than its factorization.

21010221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101022118.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21010221110 its reverse (1112201012), we get a palindrome (22122422122).

The spelling of 21010221110 in words is "twenty-one billion, ten million, two hundred twenty-one thousand, one hundred ten".