21220202110 has 16 divisors (see below), whose sum is σ = 38278869696. Its totient is φ = 8469746208.

The previous prime is 21220202083. The next prime is 21220202131. The reversal of 21220202110 is 1120202212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2286969 + ... + 2296228.

It is an arithmetic number, because the mean of its divisors is an integer number (2392429356).

Almost surely, 2^21220202110 is an apocalyptic number.

21220202110 is a deficient number, since it is larger than the sum of its proper divisors (17058667586).

21220202110 is a wasteful number, since it uses less digits than its factorization.

21220202110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4583667.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21220202110 its reverse (1120202212), we get a palindrome (22340404322).

The spelling of 21220202110 in words is "twenty-one billion, two hundred twenty million, two hundred two thousand, one hundred ten".