21103222210 has 32 divisors (see below), whose sum is σ = 43463122560. Its totient is φ = 7226927232.

The previous prime is 21103222199. The next prime is 21103222219. The reversal of 21103222210 is 1222230112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21103222219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115900 + ... + 235879.

It is an arithmetic number, because the mean of its divisors is an integer number (1358222580).

Almost surely, 2^21103222210 is an apocalyptic number.

21103222210 is an abundant number, since it is smaller than the sum of its proper divisors (22359900350).

21103222210 is a wasteful number, since it uses less digits than its factorization.

21103222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352650.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21103222210 its reverse (1222230112), we get a palindrome (22325452322).

The spelling of 21103222210 in words is "twenty-one billion, one hundred three million, two hundred twenty-two thousand, two hundred ten".