21110404210 has 32 divisors (see below), whose sum is σ = 43510545792. Its totient is φ = 7223948160.

The previous prime is 21110404207. The next prime is 21110404229. The reversal of 21110404210 is 1240401112.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 252952 + ... + 325891.

It is an arithmetic number, because the mean of its divisors is an integer number (1359704556).

Almost surely, 2^21110404210 is an apocalyptic number.

21110404210 is an abundant number, since it is smaller than the sum of its proper divisors (22400141582).

21110404210 is a wasteful number, since it uses less digits than its factorization.

21110404210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579378.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21110404210 its reverse (1240401112), we get a palindrome (22350805322).

The spelling of 21110404210 in words is "twenty-one billion, one hundred ten million, four hundred four thousand, two hundred ten".