21103102210 has 32 divisors (see below), whose sum is σ = 40960080000. Its totient is φ = 7801914240.

The previous prime is 21103102199. The next prime is 21103102211. The reversal of 21103102210 is 1220130112.

It is not an unprimeable number, because it can be changed into a prime (21103102211) by changing a digit.

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, 1346710 + ... + 1362289.

It is an arithmetic number, because the mean of its divisors is an integer number (1280002500).

Almost surely, 2^21103102210 is an apocalyptic number.

21103102210 is a deficient number, since it is larger than the sum of its proper divisors (19856977790).

21103102210 is a wasteful number, since it uses less digits than its factorization.

21103102210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709066.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21103102210 its reverse (1220130112), we get a palindrome (22323232322).

The spelling of 21103102210 in words is "twenty-one billion, one hundred three million, one hundred two thousand, two hundred ten".