21113102210 has 16 divisors (see below), whose sum is σ = 38647713600. Its totient is φ = 8302100976.

The previous prime is 21113102177. The next prime is 21113102249. The reversal of 21113102210 is 1220131112.

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, 17891870 + ... + 17893049.

It is an arithmetic number, because the mean of its divisors is an integer number (2415482100).

Almost surely, 2^21113102210 is an apocalyptic number.

21113102210 is a deficient number, since it is larger than the sum of its proper divisors (17534611390).

21113102210 is a wasteful number, since it uses less digits than its factorization.

21113102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35784985.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21113102210 its reverse (1220131112), we get a palindrome (22333233322).

The spelling of 21113102210 in words is "twenty-one billion, one hundred thirteen million, one hundred two thousand, two hundred ten".